ffmpeg / libavformat / rm.c @ 5509bffa
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/*
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* "Real" compatible mux and demux.
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* Copyright (c) 2000, 2001 Fabrice Bellard.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avformat.h" |
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/* in ms */
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#define BUFFER_DURATION 0 |
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typedef struct { |
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int nb_packets;
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int packet_total_size;
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int packet_max_size;
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/* codec related output */
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int bit_rate;
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float frame_rate;
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int nb_frames; /* current frame number */ |
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int total_frames; /* total number of frames */ |
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int num;
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AVCodecContext *enc; |
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} StreamInfo; |
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typedef struct { |
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StreamInfo streams[2];
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StreamInfo *audio_stream, *video_stream; |
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int data_pos; /* position of the data after the header */ |
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int nb_packets;
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int old_format;
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int current_stream;
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int remaining_len;
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/// Audio descrambling matrix parameters
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uint8_t *audiobuf; ///< place to store reordered audio data
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int64_t audiotimestamp; ///< Audio packet timestamp
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int sub_packet_cnt; // Subpacket counter, used while reading |
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int sub_packet_size, sub_packet_h, coded_framesize; ///< Descrambling parameters from container |
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int audio_stream_num; ///< Stream number for audio packets |
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int audio_pkt_cnt; ///< Output packet counter |
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int audio_framesize; /// Audio frame size from container |
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} RMContext; |
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#ifdef CONFIG_MUXERS
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static void put_str(ByteIOContext *s, const char *tag) |
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{ |
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put_be16(s,strlen(tag)); |
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while (*tag) {
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put_byte(s, *tag++); |
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} |
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} |
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static void put_str8(ByteIOContext *s, const char *tag) |
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{ |
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put_byte(s, strlen(tag)); |
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while (*tag) {
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put_byte(s, *tag++); |
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} |
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} |
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static void rv10_write_header(AVFormatContext *ctx, |
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int data_size, int index_pos) |
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{ |
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RMContext *rm = ctx->priv_data; |
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ByteIOContext *s = &ctx->pb; |
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StreamInfo *stream; |
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unsigned char *data_offset_ptr, *start_ptr; |
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const char *desc, *mimetype; |
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int nb_packets, packet_total_size, packet_max_size, size, packet_avg_size, i;
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int bit_rate, v, duration, flags, data_pos;
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start_ptr = s->buf_ptr; |
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put_tag(s, ".RMF");
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put_be32(s,18); /* header size */ |
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put_be16(s,0);
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put_be32(s,0);
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put_be32(s,4 + ctx->nb_streams); /* num headers */ |
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put_tag(s,"PROP");
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put_be32(s, 50);
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put_be16(s, 0);
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packet_max_size = 0;
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packet_total_size = 0;
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nb_packets = 0;
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bit_rate = 0;
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duration = 0;
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for(i=0;i<ctx->nb_streams;i++) { |
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StreamInfo *stream = &rm->streams[i]; |
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bit_rate += stream->bit_rate; |
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if (stream->packet_max_size > packet_max_size)
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packet_max_size = stream->packet_max_size; |
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nb_packets += stream->nb_packets; |
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packet_total_size += stream->packet_total_size; |
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/* select maximum duration */
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v = (int) (1000.0 * (float)stream->total_frames / stream->frame_rate); |
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if (v > duration)
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duration = v; |
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} |
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put_be32(s, bit_rate); /* max bit rate */
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put_be32(s, bit_rate); /* avg bit rate */
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put_be32(s, packet_max_size); /* max packet size */
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if (nb_packets > 0) |
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packet_avg_size = packet_total_size / nb_packets; |
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else
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packet_avg_size = 0;
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put_be32(s, packet_avg_size); /* avg packet size */
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put_be32(s, nb_packets); /* num packets */
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put_be32(s, duration); /* duration */
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put_be32(s, BUFFER_DURATION); /* preroll */
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put_be32(s, index_pos); /* index offset */
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/* computation of data the data offset */
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data_offset_ptr = s->buf_ptr; |
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put_be32(s, 0); /* data offset : will be patched after */ |
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put_be16(s, ctx->nb_streams); /* num streams */
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flags = 1 | 2; /* save allowed & perfect play */ |
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if (url_is_streamed(s))
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flags |= 4; /* live broadcast */ |
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put_be16(s, flags); |
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/* comments */
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put_tag(s,"CONT");
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size = strlen(ctx->title) + strlen(ctx->author) + strlen(ctx->copyright) + |
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strlen(ctx->comment) + 4 * 2 + 10; |
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put_be32(s,size); |
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put_be16(s,0);
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put_str(s, ctx->title); |
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put_str(s, ctx->author); |
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put_str(s, ctx->copyright); |
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put_str(s, ctx->comment); |
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for(i=0;i<ctx->nb_streams;i++) { |
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int codec_data_size;
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stream = &rm->streams[i]; |
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if (stream->enc->codec_type == CODEC_TYPE_AUDIO) {
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desc = "The Audio Stream";
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mimetype = "audio/x-pn-realaudio";
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codec_data_size = 73;
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} else {
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desc = "The Video Stream";
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mimetype = "video/x-pn-realvideo";
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codec_data_size = 34;
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} |
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put_tag(s,"MDPR");
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size = 10 + 9 * 4 + strlen(desc) + strlen(mimetype) + codec_data_size; |
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put_be32(s, size); |
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put_be16(s, 0);
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put_be16(s, i); /* stream number */
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put_be32(s, stream->bit_rate); /* max bit rate */
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put_be32(s, stream->bit_rate); /* avg bit rate */
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put_be32(s, stream->packet_max_size); /* max packet size */
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if (stream->nb_packets > 0) |
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packet_avg_size = stream->packet_total_size / |
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stream->nb_packets; |
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else
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packet_avg_size = 0;
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put_be32(s, packet_avg_size); /* avg packet size */
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put_be32(s, 0); /* start time */ |
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put_be32(s, BUFFER_DURATION); /* preroll */
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/* duration */
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if (url_is_streamed(s) || !stream->total_frames)
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put_be32(s, (int)(3600 * 1000)); |
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else
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put_be32(s, (int)(stream->total_frames * 1000 / stream->frame_rate)); |
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put_str8(s, desc); |
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put_str8(s, mimetype); |
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put_be32(s, codec_data_size); |
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if (stream->enc->codec_type == CODEC_TYPE_AUDIO) {
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int coded_frame_size, fscode, sample_rate;
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sample_rate = stream->enc->sample_rate; |
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coded_frame_size = (stream->enc->bit_rate * |
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stream->enc->frame_size) / (8 * sample_rate);
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/* audio codec info */
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put_tag(s, ".ra");
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put_byte(s, 0xfd);
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put_be32(s, 0x00040000); /* version */ |
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put_tag(s, ".ra4");
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put_be32(s, 0x01b53530); /* stream length */ |
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put_be16(s, 4); /* unknown */ |
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put_be32(s, 0x39); /* header size */ |
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switch(sample_rate) {
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case 48000: |
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case 24000: |
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case 12000: |
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fscode = 1;
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break;
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default:
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case 44100: |
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case 22050: |
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case 11025: |
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fscode = 2;
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break;
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case 32000: |
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case 16000: |
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case 8000: |
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fscode = 3;
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} |
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put_be16(s, fscode); /* codec additional info, for AC3, seems
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to be a frequency code */
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/* special hack to compensate rounding errors... */
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if (coded_frame_size == 557) |
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coded_frame_size--; |
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put_be32(s, coded_frame_size); /* frame length */
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put_be32(s, 0x51540); /* unknown */ |
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put_be32(s, 0x249f0); /* unknown */ |
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put_be32(s, 0x249f0); /* unknown */ |
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put_be16(s, 0x01);
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/* frame length : seems to be very important */
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put_be16(s, coded_frame_size); |
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put_be32(s, 0); /* unknown */ |
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put_be16(s, stream->enc->sample_rate); /* sample rate */
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put_be32(s, 0x10); /* unknown */ |
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put_be16(s, stream->enc->channels); |
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put_str8(s, "Int0"); /* codec name */ |
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put_str8(s, "dnet"); /* codec name */ |
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put_be16(s, 0); /* title length */ |
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put_be16(s, 0); /* author length */ |
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put_be16(s, 0); /* copyright length */ |
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put_byte(s, 0); /* end of header */ |
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} else {
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/* video codec info */
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put_be32(s,34); /* size */ |
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if(stream->enc->codec_id == CODEC_ID_RV10)
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put_tag(s,"VIDORV10");
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else
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put_tag(s,"VIDORV20");
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put_be16(s, stream->enc->width); |
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put_be16(s, stream->enc->height); |
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put_be16(s, (int) stream->frame_rate); /* frames per seconds ? */ |
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put_be32(s,0); /* unknown meaning */ |
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put_be16(s, (int) stream->frame_rate); /* unknown meaning */ |
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put_be32(s,0); /* unknown meaning */ |
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put_be16(s, 8); /* unknown meaning */ |
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/* Seems to be the codec version: only use basic H263. The next
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versions seems to add a diffential DC coding as in
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MPEG... nothing new under the sun */
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if(stream->enc->codec_id == CODEC_ID_RV10)
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put_be32(s,0x10000000);
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else
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put_be32(s,0x20103001);
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//put_be32(s,0x10003000);
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} |
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} |
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/* patch data offset field */
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data_pos = s->buf_ptr - start_ptr; |
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rm->data_pos = data_pos; |
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data_offset_ptr[0] = data_pos >> 24; |
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data_offset_ptr[1] = data_pos >> 16; |
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data_offset_ptr[2] = data_pos >> 8; |
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data_offset_ptr[3] = data_pos;
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/* data stream */
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put_tag(s,"DATA");
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put_be32(s,data_size + 10 + 8); |
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put_be16(s,0);
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put_be32(s, nb_packets); /* number of packets */
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put_be32(s,0); /* next data header */ |
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} |
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static void write_packet_header(AVFormatContext *ctx, StreamInfo *stream, |
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int length, int key_frame) |
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{ |
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int timestamp;
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ByteIOContext *s = &ctx->pb; |
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stream->nb_packets++; |
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stream->packet_total_size += length; |
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if (length > stream->packet_max_size)
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stream->packet_max_size = length; |
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put_be16(s,0); /* version */ |
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put_be16(s,length + 12);
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put_be16(s, stream->num); /* stream number */
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timestamp = (1000 * (float)stream->nb_frames) / stream->frame_rate; |
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put_be32(s, timestamp); /* timestamp */
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put_byte(s, 0); /* reserved */ |
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put_byte(s, key_frame ? 2 : 0); /* flags */ |
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} |
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static int rm_write_header(AVFormatContext *s) |
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{ |
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RMContext *rm = s->priv_data; |
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StreamInfo *stream; |
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int n;
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AVCodecContext *codec; |
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for(n=0;n<s->nb_streams;n++) { |
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s->streams[n]->id = n; |
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codec = s->streams[n]->codec; |
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stream = &rm->streams[n]; |
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memset(stream, 0, sizeof(StreamInfo)); |
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stream->num = n; |
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stream->bit_rate = codec->bit_rate; |
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stream->enc = codec; |
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switch(codec->codec_type) {
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case CODEC_TYPE_AUDIO:
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rm->audio_stream = stream; |
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stream->frame_rate = (float)codec->sample_rate / (float)codec->frame_size; |
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/* XXX: dummy values */
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stream->packet_max_size = 1024;
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stream->nb_packets = 0;
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stream->total_frames = stream->nb_packets; |
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break;
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case CODEC_TYPE_VIDEO:
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rm->video_stream = stream; |
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stream->frame_rate = (float)codec->time_base.den / (float)codec->time_base.num; |
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/* XXX: dummy values */
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stream->packet_max_size = 4096;
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stream->nb_packets = 0;
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stream->total_frames = stream->nb_packets; |
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break;
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default:
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return -1; |
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} |
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} |
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rv10_write_header(s, 0, 0); |
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put_flush_packet(&s->pb); |
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return 0; |
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} |
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static int rm_write_audio(AVFormatContext *s, const uint8_t *buf, int size, int flags) |
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{ |
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uint8_t *buf1; |
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RMContext *rm = s->priv_data; |
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ByteIOContext *pb = &s->pb; |
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StreamInfo *stream = rm->audio_stream; |
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int i;
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/* XXX: suppress this malloc */
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buf1= (uint8_t*) av_malloc( size * sizeof(uint8_t) );
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write_packet_header(s, stream, size, !!(flags & PKT_FLAG_KEY)); |
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/* for AC3, the words seems to be reversed */
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for(i=0;i<size;i+=2) { |
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buf1[i] = buf[i+1];
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buf1[i+1] = buf[i];
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} |
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put_buffer(pb, buf1, size); |
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put_flush_packet(pb); |
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stream->nb_frames++; |
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av_free(buf1); |
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return 0; |
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} |
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static int rm_write_video(AVFormatContext *s, const uint8_t *buf, int size, int flags) |
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{ |
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RMContext *rm = s->priv_data; |
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ByteIOContext *pb = &s->pb; |
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StreamInfo *stream = rm->video_stream; |
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int key_frame = !!(flags & PKT_FLAG_KEY);
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/* XXX: this is incorrect: should be a parameter */
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/* Well, I spent some time finding the meaning of these bits. I am
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not sure I understood everything, but it works !! */
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#if 1 |
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write_packet_header(s, stream, size + 7, key_frame);
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/* bit 7: '1' if final packet of a frame converted in several packets */
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put_byte(pb, 0x81);
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/* bit 7: '1' if I frame. bits 6..0 : sequence number in current
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frame starting from 1 */
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if (key_frame) {
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put_byte(pb, 0x81);
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} else {
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put_byte(pb, 0x01);
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} |
390 |
put_be16(pb, 0x4000 + (size)); /* total frame size */ |
391 |
put_be16(pb, 0x4000 + (size)); /* offset from the start or the end */ |
392 |
#else
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/* full frame */
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write_packet_header(s, size + 6);
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put_byte(pb, 0xc0);
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put_be16(pb, 0x4000 + size); /* total frame size */ |
397 |
put_be16(pb, 0x4000 + packet_number * 126); /* position in stream */ |
398 |
#endif
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399 |
put_byte(pb, stream->nb_frames & 0xff);
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400 |
|
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put_buffer(pb, buf, size); |
402 |
put_flush_packet(pb); |
403 |
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stream->nb_frames++; |
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return 0; |
406 |
} |
407 |
|
408 |
static int rm_write_packet(AVFormatContext *s, AVPacket *pkt) |
409 |
{ |
410 |
if (s->streams[pkt->stream_index]->codec->codec_type ==
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CODEC_TYPE_AUDIO) |
412 |
return rm_write_audio(s, pkt->data, pkt->size, pkt->flags);
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413 |
else
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414 |
return rm_write_video(s, pkt->data, pkt->size, pkt->flags);
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415 |
} |
416 |
|
417 |
static int rm_write_trailer(AVFormatContext *s) |
418 |
{ |
419 |
RMContext *rm = s->priv_data; |
420 |
int data_size, index_pos, i;
|
421 |
ByteIOContext *pb = &s->pb; |
422 |
|
423 |
if (!url_is_streamed(&s->pb)) {
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424 |
/* end of file: finish to write header */
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425 |
index_pos = url_fseek(pb, 0, SEEK_CUR);
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data_size = index_pos - rm->data_pos; |
427 |
|
428 |
/* index */
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429 |
put_tag(pb, "INDX");
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430 |
put_be32(pb, 10 + 10 * s->nb_streams); |
431 |
put_be16(pb, 0);
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432 |
|
433 |
for(i=0;i<s->nb_streams;i++) { |
434 |
put_be32(pb, 0); /* zero indices */ |
435 |
put_be16(pb, i); /* stream number */
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put_be32(pb, 0); /* next index */ |
437 |
} |
438 |
/* undocumented end header */
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439 |
put_be32(pb, 0);
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put_be32(pb, 0);
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|
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url_fseek(pb, 0, SEEK_SET);
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443 |
for(i=0;i<s->nb_streams;i++) |
444 |
rm->streams[i].total_frames = rm->streams[i].nb_frames; |
445 |
rv10_write_header(s, data_size, index_pos); |
446 |
} else {
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447 |
/* undocumented end header */
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448 |
put_be32(pb, 0);
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449 |
put_be32(pb, 0);
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} |
451 |
put_flush_packet(pb); |
452 |
return 0; |
453 |
} |
454 |
#endif //CONFIG_MUXERS |
455 |
|
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/***************************************************/
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457 |
|
458 |
static void get_str(ByteIOContext *pb, char *buf, int buf_size) |
459 |
{ |
460 |
int len, i;
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461 |
char *q;
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462 |
|
463 |
len = get_be16(pb); |
464 |
q = buf; |
465 |
for(i=0;i<len;i++) { |
466 |
if (i < buf_size - 1) |
467 |
*q++ = get_byte(pb); |
468 |
} |
469 |
*q = '\0';
|
470 |
} |
471 |
|
472 |
static void get_str8(ByteIOContext *pb, char *buf, int buf_size) |
473 |
{ |
474 |
int len, i;
|
475 |
char *q;
|
476 |
|
477 |
len = get_byte(pb); |
478 |
q = buf; |
479 |
for(i=0;i<len;i++) { |
480 |
if (i < buf_size - 1) |
481 |
*q++ = get_byte(pb); |
482 |
} |
483 |
*q = '\0';
|
484 |
} |
485 |
|
486 |
static void rm_read_audio_stream_info(AVFormatContext *s, AVStream *st, |
487 |
int read_all)
|
488 |
{ |
489 |
RMContext *rm = s->priv_data; |
490 |
ByteIOContext *pb = &s->pb; |
491 |
char buf[256]; |
492 |
uint32_t version; |
493 |
int i;
|
494 |
|
495 |
/* ra type header */
|
496 |
version = get_be32(pb); /* version */
|
497 |
if (((version >> 16) & 0xff) == 3) { |
498 |
int64_t startpos = url_ftell(pb); |
499 |
/* very old version */
|
500 |
for(i = 0; i < 14; i++) |
501 |
get_byte(pb); |
502 |
get_str8(pb, s->title, sizeof(s->title));
|
503 |
get_str8(pb, s->author, sizeof(s->author));
|
504 |
get_str8(pb, s->copyright, sizeof(s->copyright));
|
505 |
get_str8(pb, s->comment, sizeof(s->comment));
|
506 |
if ((startpos + (version & 0xffff)) >= url_ftell(pb) + 2) { |
507 |
// fourcc (should always be "lpcJ")
|
508 |
get_byte(pb); |
509 |
get_str8(pb, buf, sizeof(buf));
|
510 |
} |
511 |
// Skip extra header crap (this should never happen)
|
512 |
if ((startpos + (version & 0xffff)) > url_ftell(pb)) |
513 |
url_fskip(pb, (version & 0xffff) + startpos - url_ftell(pb));
|
514 |
st->codec->sample_rate = 8000;
|
515 |
st->codec->channels = 1;
|
516 |
st->codec->codec_type = CODEC_TYPE_AUDIO; |
517 |
st->codec->codec_id = CODEC_ID_RA_144; |
518 |
} else {
|
519 |
int flavor, sub_packet_h, coded_framesize, sub_packet_size;
|
520 |
/* old version (4) */
|
521 |
get_be32(pb); /* .ra4 */
|
522 |
get_be32(pb); /* data size */
|
523 |
get_be16(pb); /* version2 */
|
524 |
get_be32(pb); /* header size */
|
525 |
flavor= get_be16(pb); /* add codec info / flavor */
|
526 |
rm->coded_framesize = coded_framesize = get_be32(pb); /* coded frame size */
|
527 |
get_be32(pb); /* ??? */
|
528 |
get_be32(pb); /* ??? */
|
529 |
get_be32(pb); /* ??? */
|
530 |
rm->sub_packet_h = sub_packet_h = get_be16(pb); /* 1 */
|
531 |
st->codec->block_align= get_be16(pb); /* frame size */
|
532 |
rm->sub_packet_size = sub_packet_size = get_be16(pb); /* sub packet size */
|
533 |
get_be16(pb); /* ??? */
|
534 |
if (((version >> 16) & 0xff) == 5) { |
535 |
get_be16(pb); get_be16(pb); get_be16(pb); } |
536 |
st->codec->sample_rate = get_be16(pb); |
537 |
get_be32(pb); |
538 |
st->codec->channels = get_be16(pb); |
539 |
if (((version >> 16) & 0xff) == 5) { |
540 |
get_be32(pb); |
541 |
buf[0] = get_byte(pb);
|
542 |
buf[1] = get_byte(pb);
|
543 |
buf[2] = get_byte(pb);
|
544 |
buf[3] = get_byte(pb);
|
545 |
buf[4] = 0; |
546 |
} else {
|
547 |
get_str8(pb, buf, sizeof(buf)); /* desc */ |
548 |
get_str8(pb, buf, sizeof(buf)); /* desc */ |
549 |
} |
550 |
st->codec->codec_type = CODEC_TYPE_AUDIO; |
551 |
if (!strcmp(buf, "dnet")) { |
552 |
st->codec->codec_id = CODEC_ID_AC3; |
553 |
} else if (!strcmp(buf, "28_8")) { |
554 |
st->codec->codec_id = CODEC_ID_RA_288; |
555 |
st->codec->extradata_size= 0;
|
556 |
rm->audio_framesize = st->codec->block_align; |
557 |
st->codec->block_align = coded_framesize; |
558 |
rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h); |
559 |
} else if (!strcmp(buf, "cook")) { |
560 |
int codecdata_length, i;
|
561 |
get_be16(pb); get_byte(pb); |
562 |
if (((version >> 16) & 0xff) == 5) |
563 |
get_byte(pb); |
564 |
codecdata_length = get_be32(pb); |
565 |
st->codec->codec_id = CODEC_ID_COOK; |
566 |
st->codec->extradata_size= codecdata_length; |
567 |
st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
568 |
for(i = 0; i < codecdata_length; i++) |
569 |
((uint8_t*)st->codec->extradata)[i] = get_byte(pb); |
570 |
rm->audio_framesize = st->codec->block_align; |
571 |
st->codec->block_align = rm->sub_packet_size; |
572 |
rm->audiobuf = av_malloc(rm->audio_framesize * sub_packet_h); |
573 |
} else {
|
574 |
st->codec->codec_id = CODEC_ID_NONE; |
575 |
pstrcpy(st->codec->codec_name, sizeof(st->codec->codec_name),
|
576 |
buf); |
577 |
} |
578 |
if (read_all) {
|
579 |
get_byte(pb); |
580 |
get_byte(pb); |
581 |
get_byte(pb); |
582 |
|
583 |
get_str8(pb, s->title, sizeof(s->title));
|
584 |
get_str8(pb, s->author, sizeof(s->author));
|
585 |
get_str8(pb, s->copyright, sizeof(s->copyright));
|
586 |
get_str8(pb, s->comment, sizeof(s->comment));
|
587 |
} |
588 |
} |
589 |
} |
590 |
|
591 |
static int rm_read_header_old(AVFormatContext *s, AVFormatParameters *ap) |
592 |
{ |
593 |
RMContext *rm = s->priv_data; |
594 |
AVStream *st; |
595 |
|
596 |
rm->old_format = 1;
|
597 |
st = av_new_stream(s, 0);
|
598 |
if (!st)
|
599 |
goto fail;
|
600 |
rm_read_audio_stream_info(s, st, 1);
|
601 |
return 0; |
602 |
fail:
|
603 |
return -1; |
604 |
} |
605 |
|
606 |
static int rm_read_header(AVFormatContext *s, AVFormatParameters *ap) |
607 |
{ |
608 |
RMContext *rm = s->priv_data; |
609 |
AVStream *st; |
610 |
ByteIOContext *pb = &s->pb; |
611 |
unsigned int tag, v; |
612 |
int tag_size, size, codec_data_size, i;
|
613 |
int64_t codec_pos; |
614 |
unsigned int h263_hack_version, start_time, duration; |
615 |
char buf[128]; |
616 |
int flags = 0; |
617 |
|
618 |
tag = get_le32(pb); |
619 |
if (tag == MKTAG('.', 'r', 'a', 0xfd)) { |
620 |
/* very old .ra format */
|
621 |
return rm_read_header_old(s, ap);
|
622 |
} else if (tag != MKTAG('.', 'R', 'M', 'F')) { |
623 |
return AVERROR_IO;
|
624 |
} |
625 |
|
626 |
get_be32(pb); /* header size */
|
627 |
get_be16(pb); |
628 |
get_be32(pb); |
629 |
get_be32(pb); /* number of headers */
|
630 |
|
631 |
for(;;) {
|
632 |
if (url_feof(pb))
|
633 |
goto fail;
|
634 |
tag = get_le32(pb); |
635 |
tag_size = get_be32(pb); |
636 |
get_be16(pb); |
637 |
#if 0
|
638 |
printf("tag=%c%c%c%c (%08x) size=%d\n",
|
639 |
(tag) & 0xff,
|
640 |
(tag >> 8) & 0xff,
|
641 |
(tag >> 16) & 0xff,
|
642 |
(tag >> 24) & 0xff,
|
643 |
tag,
|
644 |
tag_size);
|
645 |
#endif
|
646 |
if (tag_size < 10 && tag != MKTAG('D', 'A', 'T', 'A')) |
647 |
goto fail;
|
648 |
switch(tag) {
|
649 |
case MKTAG('P', 'R', 'O', 'P'): |
650 |
/* file header */
|
651 |
get_be32(pb); /* max bit rate */
|
652 |
get_be32(pb); /* avg bit rate */
|
653 |
get_be32(pb); /* max packet size */
|
654 |
get_be32(pb); /* avg packet size */
|
655 |
get_be32(pb); /* nb packets */
|
656 |
get_be32(pb); /* duration */
|
657 |
get_be32(pb); /* preroll */
|
658 |
get_be32(pb); /* index offset */
|
659 |
get_be32(pb); /* data offset */
|
660 |
get_be16(pb); /* nb streams */
|
661 |
flags = get_be16(pb); /* flags */
|
662 |
break;
|
663 |
case MKTAG('C', 'O', 'N', 'T'): |
664 |
get_str(pb, s->title, sizeof(s->title));
|
665 |
get_str(pb, s->author, sizeof(s->author));
|
666 |
get_str(pb, s->copyright, sizeof(s->copyright));
|
667 |
get_str(pb, s->comment, sizeof(s->comment));
|
668 |
break;
|
669 |
case MKTAG('M', 'D', 'P', 'R'): |
670 |
st = av_new_stream(s, 0);
|
671 |
if (!st)
|
672 |
goto fail;
|
673 |
st->id = get_be16(pb); |
674 |
get_be32(pb); /* max bit rate */
|
675 |
st->codec->bit_rate = get_be32(pb); /* bit rate */
|
676 |
get_be32(pb); /* max packet size */
|
677 |
get_be32(pb); /* avg packet size */
|
678 |
start_time = get_be32(pb); /* start time */
|
679 |
get_be32(pb); /* preroll */
|
680 |
duration = get_be32(pb); /* duration */
|
681 |
st->start_time = start_time; |
682 |
st->duration = duration; |
683 |
get_str8(pb, buf, sizeof(buf)); /* desc */ |
684 |
get_str8(pb, buf, sizeof(buf)); /* mimetype */ |
685 |
codec_data_size = get_be32(pb); |
686 |
codec_pos = url_ftell(pb); |
687 |
st->codec->codec_type = CODEC_TYPE_DATA; |
688 |
av_set_pts_info(st, 64, 1, 1000); |
689 |
|
690 |
v = get_be32(pb); |
691 |
if (v == MKTAG(0xfd, 'a', 'r', '.')) { |
692 |
/* ra type header */
|
693 |
rm_read_audio_stream_info(s, st, 0);
|
694 |
} else {
|
695 |
int fps, fps2;
|
696 |
if (get_le32(pb) != MKTAG('V', 'I', 'D', 'O')) { |
697 |
fail1:
|
698 |
av_log(st->codec, AV_LOG_ERROR, "Unsupported video codec\n");
|
699 |
goto skip;
|
700 |
} |
701 |
st->codec->codec_tag = get_le32(pb); |
702 |
// av_log(NULL, AV_LOG_DEBUG, "%X %X\n", st->codec->codec_tag, MKTAG('R', 'V', '2', '0'));
|
703 |
if ( st->codec->codec_tag != MKTAG('R', 'V', '1', '0') |
704 |
&& st->codec->codec_tag != MKTAG('R', 'V', '2', '0') |
705 |
&& st->codec->codec_tag != MKTAG('R', 'V', '3', '0') |
706 |
&& st->codec->codec_tag != MKTAG('R', 'V', '4', '0')) |
707 |
goto fail1;
|
708 |
st->codec->width = get_be16(pb); |
709 |
st->codec->height = get_be16(pb); |
710 |
st->codec->time_base.num= 1;
|
711 |
fps= get_be16(pb); |
712 |
st->codec->codec_type = CODEC_TYPE_VIDEO; |
713 |
get_be32(pb); |
714 |
fps2= get_be16(pb); |
715 |
get_be16(pb); |
716 |
|
717 |
st->codec->extradata_size= codec_data_size - (url_ftell(pb) - codec_pos); |
718 |
st->codec->extradata= av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE); |
719 |
get_buffer(pb, st->codec->extradata, st->codec->extradata_size); |
720 |
|
721 |
// av_log(NULL, AV_LOG_DEBUG, "fps= %d fps2= %d\n", fps, fps2);
|
722 |
st->codec->time_base.den = fps * st->codec->time_base.num; |
723 |
/* modification of h263 codec version (!) */
|
724 |
#ifdef WORDS_BIGENDIAN
|
725 |
h263_hack_version = ((uint32_t*)st->codec->extradata)[1];
|
726 |
#else
|
727 |
h263_hack_version = bswap_32(((uint32_t*)st->codec->extradata)[1]);
|
728 |
#endif
|
729 |
st->codec->sub_id = h263_hack_version; |
730 |
switch((h263_hack_version>>28)){ |
731 |
case 1: st->codec->codec_id = CODEC_ID_RV10; break; |
732 |
case 2: st->codec->codec_id = CODEC_ID_RV20; break; |
733 |
case 3: st->codec->codec_id = CODEC_ID_RV30; break; |
734 |
case 4: st->codec->codec_id = CODEC_ID_RV40; break; |
735 |
default: goto fail1; |
736 |
} |
737 |
} |
738 |
skip:
|
739 |
/* skip codec info */
|
740 |
size = url_ftell(pb) - codec_pos; |
741 |
url_fskip(pb, codec_data_size - size); |
742 |
break;
|
743 |
case MKTAG('D', 'A', 'T', 'A'): |
744 |
goto header_end;
|
745 |
default:
|
746 |
/* unknown tag: skip it */
|
747 |
url_fskip(pb, tag_size - 10);
|
748 |
break;
|
749 |
} |
750 |
} |
751 |
header_end:
|
752 |
rm->nb_packets = get_be32(pb); /* number of packets */
|
753 |
if (!rm->nb_packets && (flags & 4)) |
754 |
rm->nb_packets = 3600 * 25; |
755 |
get_be32(pb); /* next data header */
|
756 |
return 0; |
757 |
|
758 |
fail:
|
759 |
for(i=0;i<s->nb_streams;i++) { |
760 |
av_free(s->streams[i]); |
761 |
} |
762 |
return AVERROR_IO;
|
763 |
} |
764 |
|
765 |
static int get_num(ByteIOContext *pb, int *len) |
766 |
{ |
767 |
int n, n1;
|
768 |
|
769 |
n = get_be16(pb); |
770 |
(*len)-=2;
|
771 |
if (n >= 0x4000) { |
772 |
return n - 0x4000; |
773 |
} else {
|
774 |
n1 = get_be16(pb); |
775 |
(*len)-=2;
|
776 |
return (n << 16) | n1; |
777 |
} |
778 |
} |
779 |
|
780 |
/* multiple of 20 bytes for ra144 (ugly) */
|
781 |
#define RAW_PACKET_SIZE 1000 |
782 |
|
783 |
static int sync(AVFormatContext *s, int64_t *timestamp, int *flags, int *stream_index, int64_t *pos){ |
784 |
RMContext *rm = s->priv_data; |
785 |
ByteIOContext *pb = &s->pb; |
786 |
int len, num, res, i;
|
787 |
AVStream *st; |
788 |
uint32_t state=0xFFFFFFFF;
|
789 |
|
790 |
while(!url_feof(pb)){
|
791 |
*pos= url_ftell(pb); |
792 |
if(rm->remaining_len > 0){ |
793 |
num= rm->current_stream; |
794 |
len= rm->remaining_len; |
795 |
*timestamp = AV_NOPTS_VALUE; |
796 |
*flags= 0;
|
797 |
}else{
|
798 |
state= (state<<8) + get_byte(pb);
|
799 |
|
800 |
if(state == MKBETAG('I', 'N', 'D', 'X')){ |
801 |
len = get_be16(pb) - 6;
|
802 |
if(len<0) |
803 |
continue;
|
804 |
goto skip;
|
805 |
} |
806 |
|
807 |
if(state > (unsigned)0xFFFF || state < 12) |
808 |
continue;
|
809 |
len=state; |
810 |
state= 0xFFFFFFFF;
|
811 |
|
812 |
num = get_be16(pb); |
813 |
*timestamp = get_be32(pb); |
814 |
res= get_byte(pb); /* reserved */
|
815 |
*flags = get_byte(pb); /* flags */
|
816 |
|
817 |
|
818 |
len -= 12;
|
819 |
} |
820 |
for(i=0;i<s->nb_streams;i++) { |
821 |
st = s->streams[i]; |
822 |
if (num == st->id)
|
823 |
break;
|
824 |
} |
825 |
if (i == s->nb_streams) {
|
826 |
skip:
|
827 |
/* skip packet if unknown number */
|
828 |
url_fskip(pb, len); |
829 |
rm->remaining_len -= len; |
830 |
continue;
|
831 |
} |
832 |
*stream_index= i; |
833 |
|
834 |
return len;
|
835 |
} |
836 |
return -1; |
837 |
} |
838 |
|
839 |
static int rm_read_packet(AVFormatContext *s, AVPacket *pkt) |
840 |
{ |
841 |
RMContext *rm = s->priv_data; |
842 |
ByteIOContext *pb = &s->pb; |
843 |
AVStream *st; |
844 |
int i, len, tmp, j;
|
845 |
int64_t timestamp, pos; |
846 |
uint8_t *ptr; |
847 |
int flags;
|
848 |
|
849 |
if (rm->audio_pkt_cnt) {
|
850 |
// If there are queued audio packet return them first
|
851 |
st = s->streams[rm->audio_stream_num]; |
852 |
av_new_packet(pkt, st->codec->block_align); |
853 |
memcpy(pkt->data, rm->audiobuf + st->codec->block_align * |
854 |
(rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - rm->audio_pkt_cnt), |
855 |
st->codec->block_align); |
856 |
rm->audio_pkt_cnt--; |
857 |
pkt->flags = 0;
|
858 |
pkt->stream_index = rm->audio_stream_num; |
859 |
} else if (rm->old_format) { |
860 |
st = s->streams[0];
|
861 |
if (st->codec->codec_id == CODEC_ID_RA_288) {
|
862 |
int x, y;
|
863 |
|
864 |
for (y = 0; y < rm->sub_packet_h; y++) |
865 |
for (x = 0; x < rm->sub_packet_h/2; x++) |
866 |
if (get_buffer(pb, rm->audiobuf+x*2*rm->audio_framesize+y*rm->coded_framesize, rm->coded_framesize) <= 0) |
867 |
return AVERROR_IO;
|
868 |
rm->audio_stream_num = 0;
|
869 |
rm->audio_pkt_cnt = rm->sub_packet_h * rm->audio_framesize / st->codec->block_align - 1;
|
870 |
// Release first audio packet
|
871 |
av_new_packet(pkt, st->codec->block_align); |
872 |
memcpy(pkt->data, rm->audiobuf, st->codec->block_align); |
873 |
pkt->flags |= PKT_FLAG_KEY; // Mark first packet as keyframe
|
874 |
pkt->stream_index = 0;
|
875 |
} else {
|
876 |
/* just read raw bytes */
|
877 |
len = RAW_PACKET_SIZE; |
878 |
len= av_get_packet(pb, pkt, len); |
879 |
pkt->stream_index = 0;
|
880 |
if (len <= 0) { |
881 |
return AVERROR_IO;
|
882 |
} |
883 |
pkt->size = len; |
884 |
} |
885 |
} else {
|
886 |
int seq=1; |
887 |
resync:
|
888 |
len=sync(s, ×tamp, &flags, &i, &pos); |
889 |
if(len<0) |
890 |
return AVERROR_IO;
|
891 |
st = s->streams[i]; |
892 |
|
893 |
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
|
894 |
int h, pic_num, len2, pos;
|
895 |
|
896 |
h= get_byte(pb); len--; |
897 |
if(!(h & 0x40)){ |
898 |
seq = get_byte(pb); len--; |
899 |
} |
900 |
|
901 |
if((h & 0xc0) == 0x40){ |
902 |
len2= pos= 0;
|
903 |
}else{
|
904 |
len2 = get_num(pb, &len); |
905 |
pos = get_num(pb, &len); |
906 |
} |
907 |
/* picture number */
|
908 |
pic_num= get_byte(pb); len--; |
909 |
rm->remaining_len= len; |
910 |
rm->current_stream= st->id; |
911 |
|
912 |
// av_log(NULL, AV_LOG_DEBUG, "%X len:%d pos:%d len2:%d pic_num:%d\n",h, len, pos, len2, pic_num);
|
913 |
if(len2 && len2<len)
|
914 |
len=len2; |
915 |
rm->remaining_len-= len; |
916 |
av_get_packet(pb, pkt, len); |
917 |
} |
918 |
|
919 |
if (st->codec->codec_type == CODEC_TYPE_AUDIO) {
|
920 |
if ((st->codec->codec_id == CODEC_ID_RA_288) ||
|
921 |
(st->codec->codec_id == CODEC_ID_COOK)) { |
922 |
int x;
|
923 |
int sps = rm->sub_packet_size;
|
924 |
int cfs = rm->coded_framesize;
|
925 |
int h = rm->sub_packet_h;
|
926 |
int y = rm->sub_packet_cnt;
|
927 |
int w = rm->audio_framesize;
|
928 |
|
929 |
if (flags & 2) |
930 |
y = rm->sub_packet_cnt = 0;
|
931 |
if (!y)
|
932 |
rm->audiotimestamp = timestamp; |
933 |
|
934 |
switch(st->codec->codec_id) {
|
935 |
case CODEC_ID_RA_288:
|
936 |
for (x = 0; x < h/2; x++) |
937 |
get_buffer(pb, rm->audiobuf+x*2*w+y*cfs, cfs);
|
938 |
break;
|
939 |
case CODEC_ID_COOK:
|
940 |
for (x = 0; x < w/sps; x++) |
941 |
get_buffer(pb, rm->audiobuf+sps*(h*x+((h+1)/2)*(y&1)+(y>>1)), sps); |
942 |
break;
|
943 |
} |
944 |
|
945 |
if (++(rm->sub_packet_cnt) < h)
|
946 |
goto resync;
|
947 |
else {
|
948 |
rm->sub_packet_cnt = 0;
|
949 |
rm->audio_stream_num = i; |
950 |
rm->audio_pkt_cnt = h * w / st->codec->block_align - 1;
|
951 |
// Release first audio packet
|
952 |
av_new_packet(pkt, st->codec->block_align); |
953 |
memcpy(pkt->data, rm->audiobuf, st->codec->block_align); |
954 |
timestamp = rm->audiotimestamp; |
955 |
flags = 2; // Mark first packet as keyframe |
956 |
} |
957 |
} else
|
958 |
av_get_packet(pb, pkt, len); |
959 |
} |
960 |
|
961 |
if( (st->discard >= AVDISCARD_NONKEY && !(flags&2)) |
962 |
|| st->discard >= AVDISCARD_ALL){ |
963 |
av_free_packet(pkt); |
964 |
goto resync;
|
965 |
} |
966 |
|
967 |
pkt->stream_index = i; |
968 |
|
969 |
#if 0
|
970 |
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
|
971 |
if(st->codec->codec_id == CODEC_ID_RV20){
|
972 |
int seq= 128*(pkt->data[2]&0x7F) + (pkt->data[3]>>1);
|
973 |
av_log(NULL, AV_LOG_DEBUG, "%d %Ld %d\n", timestamp, timestamp*512LL/25, seq);
|
974 |
|
975 |
seq |= (timestamp&~0x3FFF);
|
976 |
if(seq - timestamp > 0x2000) seq -= 0x4000;
|
977 |
if(seq - timestamp < -0x2000) seq += 0x4000;
|
978 |
}
|
979 |
}
|
980 |
#endif
|
981 |
pkt->pts= timestamp; |
982 |
if(flags&2){ |
983 |
pkt->flags |= PKT_FLAG_KEY; |
984 |
if((seq&0x7F) == 1) |
985 |
av_add_index_entry(st, pos, timestamp, 0, AVINDEX_KEYFRAME);
|
986 |
} |
987 |
} |
988 |
|
989 |
/* for AC3, needs to swap bytes */
|
990 |
if (st->codec->codec_id == CODEC_ID_AC3) {
|
991 |
ptr = pkt->data; |
992 |
for(j=0;j<len;j+=2) { |
993 |
tmp = ptr[0];
|
994 |
ptr[0] = ptr[1]; |
995 |
ptr[1] = tmp;
|
996 |
ptr += 2;
|
997 |
} |
998 |
} |
999 |
return 0; |
1000 |
} |
1001 |
|
1002 |
static int rm_read_close(AVFormatContext *s) |
1003 |
{ |
1004 |
RMContext *rm = s->priv_data; |
1005 |
|
1006 |
av_free(rm->audiobuf); |
1007 |
return 0; |
1008 |
} |
1009 |
|
1010 |
static int rm_probe(AVProbeData *p) |
1011 |
{ |
1012 |
/* check file header */
|
1013 |
if (p->buf_size <= 32) |
1014 |
return 0; |
1015 |
if ((p->buf[0] == '.' && p->buf[1] == 'R' && |
1016 |
p->buf[2] == 'M' && p->buf[3] == 'F' && |
1017 |
p->buf[4] == 0 && p->buf[5] == 0) || |
1018 |
(p->buf[0] == '.' && p->buf[1] == 'r' && |
1019 |
p->buf[2] == 'a' && p->buf[3] == 0xfd)) |
1020 |
return AVPROBE_SCORE_MAX;
|
1021 |
else
|
1022 |
return 0; |
1023 |
} |
1024 |
|
1025 |
static int64_t rm_read_dts(AVFormatContext *s, int stream_index, |
1026 |
int64_t *ppos, int64_t pos_limit) |
1027 |
{ |
1028 |
RMContext *rm = s->priv_data; |
1029 |
int64_t pos, dts; |
1030 |
int stream_index2, flags, len, h;
|
1031 |
|
1032 |
pos = *ppos; |
1033 |
|
1034 |
if(rm->old_format)
|
1035 |
return AV_NOPTS_VALUE;
|
1036 |
|
1037 |
url_fseek(&s->pb, pos, SEEK_SET); |
1038 |
rm->remaining_len=0;
|
1039 |
for(;;){
|
1040 |
int seq=1; |
1041 |
AVStream *st; |
1042 |
|
1043 |
len=sync(s, &dts, &flags, &stream_index2, &pos); |
1044 |
if(len<0) |
1045 |
return AV_NOPTS_VALUE;
|
1046 |
|
1047 |
st = s->streams[stream_index2]; |
1048 |
if (st->codec->codec_type == CODEC_TYPE_VIDEO) {
|
1049 |
h= get_byte(&s->pb); len--; |
1050 |
if(!(h & 0x40)){ |
1051 |
seq = get_byte(&s->pb); len--; |
1052 |
} |
1053 |
} |
1054 |
|
1055 |
if((flags&2) && (seq&0x7F) == 1){ |
1056 |
// av_log(s, AV_LOG_DEBUG, "%d %d-%d %Ld %d\n", flags, stream_index2, stream_index, dts, seq);
|
1057 |
av_add_index_entry(st, pos, dts, 0, AVINDEX_KEYFRAME);
|
1058 |
if(stream_index2 == stream_index)
|
1059 |
break;
|
1060 |
} |
1061 |
|
1062 |
url_fskip(&s->pb, len); |
1063 |
} |
1064 |
*ppos = pos; |
1065 |
return dts;
|
1066 |
} |
1067 |
|
1068 |
static AVInputFormat rm_iformat = {
|
1069 |
"rm",
|
1070 |
"rm format",
|
1071 |
sizeof(RMContext),
|
1072 |
rm_probe, |
1073 |
rm_read_header, |
1074 |
rm_read_packet, |
1075 |
rm_read_close, |
1076 |
NULL,
|
1077 |
rm_read_dts, |
1078 |
}; |
1079 |
|
1080 |
#ifdef CONFIG_MUXERS
|
1081 |
static AVOutputFormat rm_oformat = {
|
1082 |
"rm",
|
1083 |
"rm format",
|
1084 |
"application/vnd.rn-realmedia",
|
1085 |
"rm,ra",
|
1086 |
sizeof(RMContext),
|
1087 |
CODEC_ID_AC3, |
1088 |
CODEC_ID_RV10, |
1089 |
rm_write_header, |
1090 |
rm_write_packet, |
1091 |
rm_write_trailer, |
1092 |
}; |
1093 |
#endif //CONFIG_MUXERS |
1094 |
|
1095 |
int rm_init(void) |
1096 |
{ |
1097 |
av_register_input_format(&rm_iformat); |
1098 |
#ifdef CONFIG_MUXERS
|
1099 |
av_register_output_format(&rm_oformat); |
1100 |
#endif //CONFIG_MUXERS |
1101 |
return 0; |
1102 |
} |