27 |
27 |
#include "internal.h"
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28 |
28 |
#include "vorbiscomment.h"
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29 |
29 |
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30 |
#define MAX_PAGE_SIZE 65025
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31 |
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32 |
typedef struct {
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33 |
int64_t granule;
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34 |
int stream_index;
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35 |
uint8_t flags;
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|
36 |
uint8_t segments_count;
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|
37 |
uint8_t segments[255];
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|
38 |
uint8_t data[MAX_PAGE_SIZE];
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|
39 |
uint16_t size;
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|
40 |
} OGGPage;
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41 |
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30 |
42 |
typedef struct {
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31 |
43 |
int64_t duration;
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32 |
44 |
unsigned page_counter;
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... | ... | |
37 |
49 |
int64_t last_kf_pts;
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38 |
50 |
int vrev;
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39 |
51 |
int eos;
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40 |
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unsigned packet_count; ///< number of packet buffered
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52 |
unsigned page_count; ///< number of page buffered
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53 |
OGGPage page; ///< current page
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41 |
54 |
} OGGStreamContext;
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42 |
55 |
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56 |
typedef struct OGGPageList {
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57 |
OGGPage page;
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58 |
struct OGGPageList *next;
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59 |
} OGGPageList;
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60 |
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61 |
typedef struct {
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62 |
OGGPageList *page_list;
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63 |
} OGGContext;
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64 |
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43 |
65 |
static void ogg_update_checksum(AVFormatContext *s, int64_t crc_offset)
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44 |
66 |
{
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45 |
67 |
int64_t pos = url_ftell(s->pb);
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... | ... | |
49 |
71 |
url_fseek(s->pb, pos, SEEK_SET);
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50 |
72 |
}
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51 |
73 |
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52 |
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static int ogg_write_page(AVFormatContext *s, const uint8_t *data, int size,
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53 |
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int64_t granule, int stream_index, int flags)
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74 |
static void ogg_write_page(AVFormatContext *s, OGGPage *page, int extra_flags)
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54 |
75 |
{
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55 |
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OGGStreamContext *oggstream = s->streams[stream_index]->priv_data;
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76 |
OGGStreamContext *oggstream = s->streams[page->stream_index]->priv_data;
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56 |
77 |
int64_t crc_offset;
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57 |
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int page_segments, i;
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58 |
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59 |
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if (size >= 255*255) {
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60 |
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granule = -1;
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61 |
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size = 255*255;
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62 |
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} else if (oggstream->eos)
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63 |
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flags |= 4;
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64 |
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65 |
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page_segments = FFMIN(size/255 + 1, 255);
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66 |
78 |
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67 |
79 |
init_checksum(s->pb, ff_crc04C11DB7_update, 0);
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68 |
80 |
put_tag(s->pb, "OggS");
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69 |
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put_byte(s->pb, 0);
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70 |
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put_byte(s->pb, flags);
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71 |
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put_le64(s->pb, granule);
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72 |
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put_le32(s->pb, stream_index);
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82 |
put_byte(s->pb, page->flags | extra_flags);
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83 |
put_le64(s->pb, page->granule);
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84 |
put_le32(s->pb, page->stream_index);
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73 |
85 |
put_le32(s->pb, oggstream->page_counter++);
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74 |
86 |
crc_offset = url_ftell(s->pb);
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75 |
87 |
put_le32(s->pb, 0); // crc
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76 |
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put_byte(s->pb, page_segments);
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77 |
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for (i = 0; i < page_segments-1; i++)
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78 |
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put_byte(s->pb, 255);
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79 |
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put_byte(s->pb, size - (page_segments-1)*255);
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80 |
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put_buffer(s->pb, data, size);
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88 |
put_byte(s->pb, page->segments_count);
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89 |
put_buffer(s->pb, page->segments, page->segments_count);
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90 |
put_buffer(s->pb, page->data, page->size);
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81 |
91 |
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82 |
92 |
ogg_update_checksum(s, crc_offset);
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83 |
93 |
put_flush_packet(s->pb);
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return size;
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94 |
oggstream->page_count--;
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95 |
}
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97 |
static int64_t ogg_granule_to_timestamp(OGGStreamContext *oggstream, OGGPage *page)
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98 |
{
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99 |
if (oggstream->kfgshift)
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100 |
return (page->granule>>oggstream->kfgshift) +
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101 |
(page->granule & ((1<<oggstream->kfgshift)-1));
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102 |
else
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103 |
return page->granule;
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}
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106 |
static int ogg_compare_granule(AVFormatContext *s, OGGPage *next, OGGPage *page)
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107 |
{
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108 |
AVStream *st2 = s->streams[next->stream_index];
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109 |
AVStream *st = s->streams[page->stream_index];
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110 |
int64_t next_granule, cur_granule;
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111 |
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112 |
if (next->granule == -1 || page->granule == -1)
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113 |
return 0;
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114 |
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115 |
next_granule = av_rescale_q(ogg_granule_to_timestamp(st2->priv_data, next),
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116 |
st2->time_base, AV_TIME_BASE_Q);
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117 |
cur_granule = av_rescale_q(ogg_granule_to_timestamp(st->priv_data, page),
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118 |
st ->time_base, AV_TIME_BASE_Q);
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119 |
return next_granule > cur_granule;
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120 |
}
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121 |
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122 |
static int ogg_reset_cur_page(OGGStreamContext *oggstream)
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123 |
{
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124 |
oggstream->page.granule = -1;
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125 |
oggstream->page.flags = 0;
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126 |
oggstream->page.segments_count = 0;
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127 |
oggstream->page.size = 0;
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128 |
return 0;
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129 |
}
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130 |
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131 |
static int ogg_buffer_page(AVFormatContext *s, OGGStreamContext *oggstream)
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132 |
{
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133 |
OGGContext *ogg = s->priv_data;
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134 |
OGGPageList **p = &ogg->page_list;
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135 |
OGGPageList *l = av_mallocz(sizeof(*l));
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136 |
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137 |
if (!l)
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138 |
return AVERROR(ENOMEM);
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139 |
l->page = oggstream->page;
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140 |
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141 |
oggstream->page_count++;
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142 |
ogg_reset_cur_page(oggstream);
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143 |
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144 |
while (*p) {
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145 |
if (ogg_compare_granule(s, &(*p)->page, &l->page))
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146 |
break;
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147 |
p = &(*p)->next;
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148 |
}
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149 |
l->next = *p;
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150 |
*p = l;
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151 |
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152 |
return 0;
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153 |
}
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154 |
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155 |
static int ogg_buffer_data(AVFormatContext *s, AVStream *st,
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156 |
uint8_t *data, unsigned size, int64_t granule)
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157 |
{
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158 |
OGGStreamContext *oggstream = st->priv_data;
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159 |
int total_segments = size / 255 + 1;
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160 |
uint8_t *p = data;
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161 |
int i, segments, len;
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162 |
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163 |
for (i = 0; i < total_segments; ) {
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164 |
OGGPage *page = &oggstream->page;
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165 |
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166 |
segments = FFMIN(total_segments - i, 255 - page->segments_count);
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167 |
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168 |
if (i && !page->segments_count)
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169 |
page->flags |= 1; // continued packet
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170 |
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171 |
memset(page->segments+page->segments_count, 255, segments - 1);
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172 |
page->segments_count += segments - 1;
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173 |
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174 |
len = FFMIN(size, segments*255);
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175 |
page->segments[page->segments_count++] = len - (segments-1)*255;
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176 |
memcpy(page->data+page->size, p, len);
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177 |
p += len;
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178 |
size -= len;
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179 |
i += segments;
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180 |
page->size += len;
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181 |
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182 |
if (i == total_segments)
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183 |
page->granule = granule;
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184 |
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185 |
if (page->segments_count == 255) {
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186 |
ogg_buffer_page(s, oggstream);
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187 |
}
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188 |
}
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189 |
return 0;
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85 |
190 |
}
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86 |
191 |
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87 |
192 |
static uint8_t *ogg_write_vorbiscomment(int offset, int bitexact,
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... | ... | |
195 |
300 |
return -1;
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196 |
301 |
}
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197 |
302 |
oggstream = av_mallocz(sizeof(*oggstream));
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303 |
oggstream->page.stream_index = i;
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198 |
304 |
st->priv_data = oggstream;
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199 |
305 |
if (st->codec->codec_id == CODEC_ID_FLAC) {
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200 |
306 |
int err = ogg_build_flac_headers(st->codec, oggstream,
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... | ... | |
232 |
338 |
}
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233 |
339 |
}
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234 |
340 |
}
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235 |
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for (i = 0; i < 3; i++) {
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236 |
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for (j = 0; j < s->nb_streams; j++) {
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237 |
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AVStream *st = s->streams[j];
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238 |
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OGGStreamContext *oggstream = st->priv_data;
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239 |
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if (oggstream && oggstream->header_len[i]) {
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240 |
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ogg_write_page(s, oggstream->header[i], oggstream->header_len[i],
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241 |
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0, st->index, i ? 0 : 2); // bos
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242 |
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}
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341 |
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342 |
for (j = 0; j < s->nb_streams; j++) {
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343 |
OGGStreamContext *oggstream = s->streams[j]->priv_data;
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344 |
ogg_buffer_data(s, s->streams[j], oggstream->header[0],
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345 |
oggstream->header_len[0], 0);
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346 |
oggstream->page.flags |= 2; // bos
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347 |
ogg_buffer_page(s, oggstream);
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348 |
}
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349 |
for (j = 0; j < s->nb_streams; j++) {
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350 |
AVStream *st = s->streams[j];
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351 |
OGGStreamContext *oggstream = st->priv_data;
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352 |
for (i = 1; i < 3; i++) {
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353 |
if (oggstream && oggstream->header_len[i])
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354 |
ogg_buffer_data(s, st, oggstream->header[i],
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355 |
oggstream->header_len[i], 0);
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243 |
356 |
}
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357 |
ogg_buffer_page(s, oggstream);
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244 |
358 |
}
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245 |
359 |
return 0;
|
246 |
360 |
}
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247 |
361 |
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362 |
static void ogg_write_pages(AVFormatContext *s, int flush)
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363 |
{
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364 |
OGGContext *ogg = s->priv_data;
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365 |
OGGPageList *next, *p;
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366 |
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367 |
if (!ogg->page_list)
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368 |
return;
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369 |
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370 |
for (p = ogg->page_list; p; ) {
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371 |
OGGStreamContext *oggstream =
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372 |
s->streams[p->page.stream_index]->priv_data;
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373 |
if (oggstream->page_count < 2 && !flush)
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374 |
break;
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375 |
ogg_write_page(s, &p->page,
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376 |
flush && oggstream->page_count == 1 ? 4 : 0); // eos
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377 |
next = p->next;
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378 |
av_freep(&p);
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379 |
p = next;
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380 |
}
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381 |
ogg->page_list = p;
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382 |
}
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383 |
|
248 |
384 |
static int ogg_write_packet(AVFormatContext *s, AVPacket *pkt)
|
249 |
385 |
{
|
250 |
386 |
AVStream *st = s->streams[pkt->stream_index];
|
251 |
387 |
OGGStreamContext *oggstream = st->priv_data;
|
252 |
|
uint8_t *ptr = pkt->data;
|
253 |
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int ret, size = pkt->size;
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388 |
int ret;
|
254 |
389 |
int64_t granule;
|
255 |
390 |
|
256 |
391 |
if (st->codec->codec_id == CODEC_ID_THEORA) {
|
... | ... | |
268 |
403 |
} else
|
269 |
404 |
granule = pkt->pts + pkt->duration;
|
270 |
405 |
oggstream->duration = granule;
|
271 |
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do {
|
272 |
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ret = ogg_write_page(s, ptr, size, granule, pkt->stream_index, ptr != pkt->data);
|
273 |
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ptr += ret; size -= ret;
|
274 |
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} while (size > 0 || ret == 255*255); // need to output a last nil page
|
275 |
406 |
|
276 |
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return 0;
|
277 |
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}
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|
407 |
ret = ogg_buffer_data(s, st, pkt->data, pkt->size, granule);
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|
408 |
if (ret < 0)
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|
409 |
return ret;
|
278 |
410 |
|
279 |
|
static int ogg_compare_granule(AVFormatContext *s, AVPacket *next, AVPacket *pkt)
|
280 |
|
{
|
281 |
|
AVStream *st2 = s->streams[next->stream_index];
|
282 |
|
AVStream *st = s->streams[pkt ->stream_index];
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|
411 |
ogg_write_pages(s, 0);
|
283 |
412 |
|
284 |
|
int64_t next_granule = av_rescale_q(next->pts + next->duration,
|
285 |
|
st2->time_base, AV_TIME_BASE_Q);
|
286 |
|
int64_t cur_granule = av_rescale_q(pkt ->pts + pkt ->duration,
|
287 |
|
st ->time_base, AV_TIME_BASE_Q);
|
288 |
|
return next_granule > cur_granule;
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|
413 |
return 0;
|
289 |
414 |
}
|
290 |
415 |
|
291 |
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static int ogg_interleave_per_granule(AVFormatContext *s, AVPacket *out, AVPacket *pkt, int flush)
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|
416 |
static int ogg_write_trailer(AVFormatContext *s)
|
292 |
417 |
{
|
293 |
|
OGGStreamContext *ogg;
|
294 |
|
int i, stream_count = 0;
|
295 |
|
int interleaved = 0;
|
296 |
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|
297 |
|
if (pkt) {
|
298 |
|
ff_interleave_add_packet(s, pkt, ogg_compare_granule);
|
299 |
|
ogg = s->streams[pkt->stream_index]->priv_data;
|
300 |
|
ogg->packet_count++;
|
301 |
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}
|
302 |
|
|
303 |
|
for (i = 0; i < s->nb_streams; i++) {
|
304 |
|
ogg = s->streams[i]->priv_data;
|
305 |
|
stream_count += !!ogg->packet_count;
|
306 |
|
interleaved += ogg->packet_count > 1;
|
307 |
|
}
|
308 |
|
|
309 |
|
if ((s->nb_streams == stream_count && interleaved == stream_count) ||
|
310 |
|
(flush && stream_count)) {
|
311 |
|
AVPacketList *pktl= s->packet_buffer;
|
312 |
|
*out= pktl->pkt;
|
313 |
|
s->packet_buffer = pktl->next;
|
314 |
|
|
315 |
|
ogg = s->streams[out->stream_index]->priv_data;
|
316 |
|
if (flush && ogg->packet_count == 1)
|
317 |
|
ogg->eos = 1;
|
318 |
|
ogg->packet_count--;
|
|
418 |
int i;
|
319 |
419 |
|
320 |
|
if(!s->packet_buffer)
|
321 |
|
s->packet_buffer_end= NULL;
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|
420 |
/* flush current page */
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|
421 |
for (i = 0; i < s->nb_streams; i++)
|
|
422 |
ogg_buffer_page(s, s->streams[i]->priv_data);
|
322 |
423 |
|
323 |
|
if(s->streams[out->stream_index]->last_in_packet_buffer == pktl)
|
324 |
|
s->streams[out->stream_index]->last_in_packet_buffer= NULL;
|
|
424 |
ogg_write_pages(s, 1);
|
325 |
425 |
|
326 |
|
av_freep(&pktl);
|
327 |
|
return 1;
|
328 |
|
} else {
|
329 |
|
av_init_packet(out);
|
330 |
|
return 0;
|
331 |
|
}
|
332 |
|
}
|
333 |
|
|
334 |
|
static int ogg_write_trailer(AVFormatContext *s)
|
335 |
|
{
|
336 |
|
int i;
|
337 |
426 |
for (i = 0; i < s->nb_streams; i++) {
|
338 |
427 |
AVStream *st = s->streams[i];
|
339 |
428 |
OGGStreamContext *oggstream = st->priv_data;
|
... | ... | |
352 |
441 |
NULL_IF_CONFIG_SMALL("Ogg"),
|
353 |
442 |
"application/ogg",
|
354 |
443 |
"ogg,ogv,spx",
|
355 |
|
0,
|
|
444 |
sizeof(OGGContext),
|
356 |
445 |
CODEC_ID_FLAC,
|
357 |
446 |
CODEC_ID_THEORA,
|
358 |
447 |
ogg_write_header,
|
359 |
448 |
ogg_write_packet,
|
360 |
449 |
ogg_write_trailer,
|
361 |
|
.interleave_packet = ogg_interleave_per_granule,
|
362 |
450 |
.metadata_conv = ff_vorbiscomment_metadata_conv,
|
363 |
451 |
};
|