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80783dc2c2
ffmpeg/libavformat/avienc.c
Fabrice Bellard 80783dc2c2 CODEC_ID_MP3LAME is obsolete 
Originally committed as revision 2232 to svn://svn.ffmpeg.org/ffmpeg/trunk
2003-09-08 22:04:29 +00:00

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/*
* AVI encoder.
* Copyright (c) 2000 Fabrice Bellard.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "avformat.h"
#include "avi.h"
/*
* TODO:
* - fill all fields if non streamed (nb_frames for example)
*/
typedef struct AVIIentry {
unsigned int flags, pos, len;
} AVIIentry;
#define AVI_INDEX_CLUSTER_SIZE 16384
typedef struct AVIIndex {
offset_t indx_start;
int entry;
int ents_allocated;
AVIIentry** cluster;
} AVIIndex;
typedef struct {
offset_t riff_start, movi_list, odml_list;
offset_t frames_hdr_all, frames_hdr_strm[MAX_STREAMS];
int audio_strm_length[MAX_STREAMS];
int riff_id;
AVIIndex indexes[MAX_STREAMS];
} AVIContext;
static inline AVIIentry* avi_get_ientry(AVIIndex* idx, int ent_id)
{
int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
return &idx->cluster[cl][id];
}
offset_t start_tag(ByteIOContext *pb, const char *tag)
{
put_tag(pb, tag);
put_le32(pb, 0);
return url_ftell(pb);
}
void end_tag(ByteIOContext *pb, offset_t start)
{
offset_t pos;
pos = url_ftell(pb);
url_fseek(pb, start - 4, SEEK_SET);
put_le32(pb, (uint32_t)(pos - start));
url_fseek(pb, pos, SEEK_SET);
}
/* Note: when encoding, the first matching tag is used, so order is
important if multiple tags possible for a given codec. */
const CodecTag codec_bmp_tags[] = {
{ CODEC_ID_H263, MKTAG('H', '2', '6', '3') },
{ CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },
{ CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
/* added based on MPlayer */
{ CODEC_ID_H263P, MKTAG('U', '2', '6', '3') },
{ CODEC_ID_H263P, MKTAG('v', 'i', 'v', '1') },
{ CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X'), .invalid_asf = 1 },
{ CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0'), .invalid_asf = 1 },
{ CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D'), .invalid_asf = 1 },
{ CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
{ CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
{ CODEC_ID_MPEG4, MKTAG(0x04, 0, 0, 0) }, /* some broken avi use this */
/* added based on MPlayer */
{ CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', '1') },
{ CODEC_ID_MPEG4, MKTAG('B', 'L', 'Z', '0') },
{ CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 'v') },
{ CODEC_ID_MPEG4, MKTAG('U', 'M', 'P', '4') },
{ CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3'), .invalid_asf = 1 }, /* default signature when using MSMPEG4 */
{ CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
/* added based on MPlayer */
{ CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', 'G', '3') },
{ CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '5') },
{ CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '6') },
{ CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '4') },
{ CODEC_ID_MSMPEG4V3, MKTAG('A', 'P', '4', '1') },
{ CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '1') },
{ CODEC_ID_MSMPEG4V3, MKTAG('C', 'O', 'L', '0') },
{ CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') },
/* added based on MPlayer */
{ CODEC_ID_MSMPEG4V2, MKTAG('D', 'I', 'V', '2') },
{ CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') },
/* added based on MPlayer */
{ CODEC_ID_MSMPEG4V1, MKTAG('D', 'I', 'V', '4') },
{ CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') },
/* added based on MPlayer */
{ CODEC_ID_WMV2, MKTAG('W', 'M', 'V', '2') },
{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'd') },
{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 'h', 'd') },
{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', 's', 'l') },
{ CODEC_ID_DVVIDEO, MKTAG('d', 'v', '2', '5') },
{ CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '1') },
{ CODEC_ID_MPEG1VIDEO, MKTAG('m', 'p', 'g', '2') },
{ CODEC_ID_MPEG1VIDEO, MKTAG('P', 'I', 'M', '1') },
{ CODEC_ID_MPEG1VIDEO, MKTAG('V', 'C', 'R', '2') },
{ CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
{ CODEC_ID_MJPEG, MKTAG('L', 'J', 'P', 'G') },
{ CODEC_ID_LJPEG, MKTAG('L', 'J', 'P', 'G') },
{ CODEC_ID_MJPEG, MKTAG('J', 'P', 'G', 'L') }, /* Pegasus lossless JPEG */
{ CODEC_ID_HUFFYUV, MKTAG('H', 'F', 'Y', 'U') },
{ CODEC_ID_CYUV, MKTAG('C', 'Y', 'U', 'V') },
{ CODEC_ID_RAWVIDEO, MKTAG('Y', '4', '2', '2') },
{ CODEC_ID_RAWVIDEO, MKTAG('I', '4', '2', '0') },
{ CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '1') },
{ CODEC_ID_INDEO3, MKTAG('I', 'V', '3', '2') },
{ CODEC_ID_VP3, MKTAG('V', 'P', '3', '1') },
{ CODEC_ID_ASV1, MKTAG('A', 'S', 'V', '1') },
{ CODEC_ID_ASV2, MKTAG('A', 'S', 'V', '2') },
{ CODEC_ID_VCR1, MKTAG('V', 'C', 'R', '1') },
{ CODEC_ID_FFV1, MKTAG('F', 'F', 'V', '1') },
{ CODEC_ID_XAN_WC4, MKTAG('X', 'x', 'a', 'n') },
{ 0, 0 },
};
unsigned int codec_get_tag(const CodecTag *tags, int id)
{
while (tags->id != 0) {
if (tags->id == id)
return tags->tag;
tags++;
}
return 0;
}
static unsigned int codec_get_asf_tag(const CodecTag *tags, int id)
{
while (tags->id != 0) {
if (!tags->invalid_asf && tags->id == id)
return tags->tag;
tags++;
}
return 0;
}
enum CodecID codec_get_id(const CodecTag *tags, unsigned int tag)
{
while (tags->id != 0) {
if( toupper((tag >> 0)&0xFF) == toupper((tags->tag >> 0)&0xFF)
&& toupper((tag >> 8)&0xFF) == toupper((tags->tag >> 8)&0xFF)
&& toupper((tag >>16)&0xFF) == toupper((tags->tag >>16)&0xFF)
&& toupper((tag >>24)&0xFF) == toupper((tags->tag >>24)&0xFF))
return tags->id;
tags++;
}
return CODEC_ID_NONE;
}
unsigned int codec_get_bmp_tag(int id)
{
return codec_get_tag(codec_bmp_tags, id);
}
unsigned int codec_get_wav_tag(int id)
{
return codec_get_tag(codec_wav_tags, id);
}
enum CodecID codec_get_bmp_id(unsigned int tag)
{
return codec_get_id(codec_bmp_tags, tag);
}
enum CodecID codec_get_wav_id(unsigned int tag)
{
return codec_get_id(codec_wav_tags, tag);
}
/* BITMAPINFOHEADER header */
void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc, const CodecTag *tags, int for_asf)
{
put_le32(pb, 40 + enc->extradata_size); /* size */
put_le32(pb, enc->width);
put_le32(pb, enc->height);
put_le16(pb, 1); /* planes */
put_le16(pb, enc->bits_per_sample ? enc->bits_per_sample : 24); /* depth */
/* compression type */
put_le32(pb, for_asf ? codec_get_asf_tag(tags, enc->codec_id) : enc->codec_tag);
put_le32(pb, enc->width * enc->height * 3);
put_le32(pb, 0);
put_le32(pb, 0);
put_le32(pb, 0);
put_le32(pb, 0);
put_buffer(pb, enc->extradata, enc->extradata_size);
if (enc->extradata_size & 1)
put_byte(pb, 0);
}
static void parse_specific_params(AVCodecContext *stream, int *au_byterate, int *au_ssize, int *au_scale)
{
switch(stream->codec_id) {
case CODEC_ID_PCM_S16LE:
*au_scale = *au_ssize = 2*stream->channels;
*au_byterate = *au_ssize * stream->sample_rate;
break;
case CODEC_ID_PCM_U8:
case CODEC_ID_PCM_ALAW:
case CODEC_ID_PCM_MULAW:
*au_scale = *au_ssize = stream->channels;
*au_byterate = *au_ssize * stream->sample_rate;
break;
case CODEC_ID_MP2:
*au_ssize = 1;
*au_scale = 1;
*au_byterate = stream->bit_rate / 8;
case CODEC_ID_MP3:
*au_ssize = 1;
*au_scale = 1;
*au_byterate = stream->bit_rate / 8;
default:
*au_ssize = 1;
*au_scale = 1;
*au_byterate = stream->bit_rate / 8;
break;
}
}
static offset_t avi_start_new_riff(AVIContext *avi, ByteIOContext *pb,
const char* riff_tag, const char* list_tag)
{
offset_t loff;
int i;
avi->riff_id++;
for (i=0; i<MAX_STREAMS; i++)
avi->indexes[i].entry = 0;
avi->riff_start = start_tag(pb, "RIFF");
put_tag(pb, riff_tag);
loff = start_tag(pb, "LIST");
put_tag(pb, list_tag);
return loff;
}
static unsigned char* avi_stream2fourcc(unsigned char* tag, int index,
enum CodecType type)
{
tag[0] = '0';
tag[1] = '0' + index;
if (type == CODEC_TYPE_VIDEO) {
tag[2] = 'd';
tag[3] = 'c';
} else {
tag[2] = 'w';
tag[3] = 'b';
}
tag[4] = '\0';
return tag;
}
static int avi_write_header(AVFormatContext *s)
{
AVIContext *avi = s->priv_data;
ByteIOContext *pb = &s->pb;
int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
AVCodecContext *stream, *video_enc;
offset_t list1, list2, strh, strf;
/* header list */
avi->riff_id = 0;
list1 = avi_start_new_riff(avi, pb, "AVI ", "hdrl");
/* avi header */
put_tag(pb, "avih");
put_le32(pb, 14 * 4);
bitrate = 0;
video_enc = NULL;
for(n=0;n<s->nb_streams;n++) {
stream = &s->streams[n]->codec;
bitrate += stream->bit_rate;
if (stream->codec_type == CODEC_TYPE_VIDEO)
video_enc = stream;
}
nb_frames = 0;
if(video_enc){
put_le32(pb, (uint32_t)(int64_t_C(1000000) * video_enc->frame_rate_base / video_enc->frame_rate));
} else {
put_le32(pb, 0);
}
put_le32(pb, bitrate / 8); /* XXX: not quite exact */
put_le32(pb, 0); /* padding */
put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
avi->frames_hdr_all = url_ftell(pb); /* remember this offset to fill later */
put_le32(pb, nb_frames); /* nb frames, filled later */
put_le32(pb, 0); /* initial frame */
put_le32(pb, s->nb_streams); /* nb streams */
put_le32(pb, 1024 * 1024); /* suggested buffer size */
if(video_enc){
put_le32(pb, video_enc->width);
put_le32(pb, video_enc->height);
} else {
put_le32(pb, 0);
put_le32(pb, 0);
}
put_le32(pb, 0); /* reserved */
put_le32(pb, 0); /* reserved */
put_le32(pb, 0); /* reserved */
put_le32(pb, 0); /* reserved */
/* stream list */
for(i=0;i<n;i++) {
list2 = start_tag(pb, "LIST");
put_tag(pb, "strl");
stream = &s->streams[i]->codec;
/* FourCC should really be set by the codec itself */
if (! stream->codec_tag) {
stream->codec_tag = codec_get_bmp_tag(stream->codec_id);
}
/* stream generic header */
strh = start_tag(pb, "strh");
switch(stream->codec_type) {
case CODEC_TYPE_VIDEO:
put_tag(pb, "vids");
put_le32(pb, stream->codec_tag);
put_le32(pb, 0); /* flags */
put_le16(pb, 0); /* priority */
put_le16(pb, 0); /* language */
put_le32(pb, 0); /* initial frame */
put_le32(pb, stream->frame_rate_base); /* scale */
put_le32(pb, stream->frame_rate); /* rate */
put_le32(pb, 0); /* start */
avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
put_le32(pb, nb_frames); /* length, XXX: fill later */
put_le32(pb, 1024 * 1024); /* suggested buffer size */
put_le32(pb, -1); /* quality */
put_le32(pb, stream->width * stream->height * 3); /* sample size */
put_le16(pb, 0);
put_le16(pb, 0);
put_le16(pb, stream->width);
put_le16(pb, stream->height);
break;
case CODEC_TYPE_AUDIO:
put_tag(pb, "auds");
put_le32(pb, 1); /* tag */
put_le32(pb, 0); /* flags */
put_le16(pb, 0); /* priority */
put_le16(pb, 0); /* language */
put_le32(pb, 0); /* initial frame */
parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
put_le32(pb, au_scale); /* scale */
put_le32(pb, au_byterate); /* rate */
put_le32(pb, 0); /* start */
avi->frames_hdr_strm[i] = url_ftell(pb); /* remember this offset to fill later */
put_le32(pb, 0); /* length, XXX: filled later */
put_le32(pb, 12 * 1024); /* suggested buffer size */
put_le32(pb, -1); /* quality */
put_le32(pb, au_ssize); /* sample size */
put_le32(pb, 0);
put_le32(pb, 0);
break;
default:
av_abort();
}
end_tag(pb, strh);
strf = start_tag(pb, "strf");
switch(stream->codec_type) {
case CODEC_TYPE_VIDEO:
put_bmp_header(pb, stream, codec_bmp_tags, 0);
break;
case CODEC_TYPE_AUDIO:
if (put_wav_header(pb, stream) < 0) {
av_free(avi);
return -1;
}
break;
default:
av_abort();
}
end_tag(pb, strf);
if (!url_is_streamed(pb)) {
unsigned char tag[5];
int j;
/* Starting to lay out AVI OpenDML master index.
* We want to make it JUNK entry for now, since we'd
* like to get away without making AVI an OpenDML one
* for compatibility reasons.
*/
avi->indexes[i].entry = avi->indexes[i].ents_allocated = 0;
avi->indexes[i].indx_start = start_tag(pb, "JUNK");
put_le16(pb, 4); /* wLongsPerEntry */
put_byte(pb, 0); /* bIndexSubType (0 == frame index) */
put_byte(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
put_le32(pb, 0); /* nEntriesInUse (will fill out later on) */
put_tag(pb, avi_stream2fourcc(&tag[0], i, stream->codec_type));
/* dwChunkId */
put_le64(pb, 0); /* dwReserved[3]
put_le32(pb, 0); Must be 0. */
for (j=0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
put_le64(pb, 0);
end_tag(pb, avi->indexes[i].indx_start);
}
end_tag(pb, list2);
}
if (!url_is_streamed(pb)) {
/* AVI could become an OpenDML one, if it grows beyond 2Gb range */
avi->odml_list = start_tag(pb, "JUNK");
put_tag(pb, "odml");
put_tag(pb, "dmlh");
put_le32(pb, 248);
for (i = 0; i < 248; i+= 4)
put_le32(pb, 0);
end_tag(pb, avi->odml_list);
}
end_tag(pb, list1);
avi->movi_list = start_tag(pb, "LIST");
put_tag(pb, "movi");
put_flush_packet(pb);
return 0;
}
static int avi_write_ix(AVFormatContext *s)
{
ByteIOContext *pb = &s->pb;
AVIContext *avi = s->priv_data;
unsigned char tag[5];
unsigned char ix_tag[] = "ix00";
int i, j;
if (avi->riff_id > AVI_MASTER_INDEX_SIZE)
return -1;
for (i=0;i<s->nb_streams;i++) {
offset_t ix, pos;
avi_stream2fourcc(&tag[0], i, s->streams[i]->codec.codec_type);
ix_tag[3] = '0' + i;
/* Writing AVI OpenDML leaf index chunk */
ix = url_ftell(pb);
put_tag(pb, &ix_tag[0]); /* ix?? */
put_le32(pb, avi->indexes[i].entry * 8 + 24);
/* chunk size */
put_le16(pb, 2); /* wLongsPerEntry */
put_byte(pb, 0); /* bIndexSubType (0 == frame index) */
put_byte(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
put_le32(pb, avi->indexes[i].entry);
/* nEntriesInUse */
put_tag(pb, &tag[0]); /* dwChunkId */
put_le64(pb, avi->movi_list);/* qwBaseOffset */
put_le32(pb, 0); /* dwReserved_3 (must be 0) */
for (j=0; j<avi->indexes[i].entry; j++) {
AVIIentry* ie = avi_get_ientry(&avi->indexes[i], j);
put_le32(pb, ie->pos + 8);
put_le32(pb, ((uint32_t)ie->len & ~0x80000000) |
(ie->flags & 0x10 ? 0 : 0x80000000));
}
put_flush_packet(pb);
pos = url_ftell(pb);
/* Updating one entry in the AVI OpenDML master index */
url_fseek(pb, avi->indexes[i].indx_start - 8, SEEK_SET);
put_tag(pb, "indx"); /* enabling this entry */
url_fskip(pb, 8);
put_le32(pb, avi->riff_id); /* nEntriesInUse */
url_fskip(pb, 16*avi->riff_id);
put_le64(pb, ix); /* qwOffset */
put_le32(pb, pos - ix); /* dwSize */
put_le32(pb, avi->indexes[i].entry); /* dwDuration */
url_fseek(pb, pos, SEEK_SET);
}
return 0;
}
static int avi_write_idx1(AVFormatContext *s)
{
ByteIOContext *pb = &s->pb;
AVIContext *avi = s->priv_data;
offset_t file_size, idx_chunk;
int i, n, nb_frames, au_byterate, au_ssize, au_scale;
AVCodecContext *stream;
unsigned char tag[5];
if (!url_is_streamed(pb)) {
AVIIentry* ie = 0, *tie;
int entry[MAX_STREAMS];
int empty, stream_id = -1;
idx_chunk = start_tag(pb, "idx1");
memset(&entry[0], 0, sizeof(entry));
do {
empty = 1;
for (i=0; i<s->nb_streams; i++) {
if (avi->indexes[i].entry <= entry[i])
continue;
tie = avi_get_ientry(&avi->indexes[i], entry[i]);
if (empty || tie->pos < ie->pos) {
ie = tie;
stream_id = i;
}
empty = 0;
}
if (!empty) {
avi_stream2fourcc(&tag[0], stream_id,
s->streams[stream_id]->codec.codec_type);
put_tag(pb, &tag[0]);
put_le32(pb, ie->flags);
put_le32(pb, ie->pos);
put_le32(pb, ie->len);
entry[stream_id]++;
}
} while (!empty);
end_tag(pb, idx_chunk);
/* Fill in frame/sample counters */
file_size = url_ftell(pb);
nb_frames = 0;
for(n=0;n<s->nb_streams;n++) {
if (avi->frames_hdr_strm[n] != 0) {
stream = &s->streams[n]->codec;
url_fseek(pb, avi->frames_hdr_strm[n], SEEK_SET);
if (stream->codec_type == CODEC_TYPE_VIDEO) {
put_le32(pb, stream->frame_number);
if (nb_frames < stream->frame_number)
nb_frames = stream->frame_number;
} else {
if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) {
put_le32(pb, stream->frame_number);
nb_frames += stream->frame_number;
} else {
parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
put_le32(pb, avi->audio_strm_length[n] / au_ssize);
}
}
}
}
if (avi->frames_hdr_all != 0) {
url_fseek(pb, avi->frames_hdr_all, SEEK_SET);
put_le32(pb, nb_frames);
}
url_fseek(pb, file_size, SEEK_SET);
}
return 0;
}
static int avi_write_packet(AVFormatContext *s, int stream_index,
uint8_t *buf, int size, int force_pts)
{
AVIContext *avi = s->priv_data;
ByteIOContext *pb = &s->pb;
unsigned char tag[5];
unsigned int flags;
AVCodecContext *enc;
if (url_ftell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE) {
avi_write_ix(s);
end_tag(pb, avi->movi_list);
if (avi->riff_id == 1)
avi_write_idx1(s);
end_tag(pb, avi->riff_start);
avi->movi_list = avi_start_new_riff(avi, pb, "AVIX", "movi");
}
enc = &s->streams[stream_index]->codec;
avi_stream2fourcc(&tag[0], stream_index, enc->codec_type);
if (enc->codec_type == CODEC_TYPE_AUDIO) {
avi->audio_strm_length[stream_index] += size;
flags = 0x10;
} else
flags = enc->coded_frame->key_frame ? 0x10 : 0x00;
if (!url_is_streamed(&s->pb)) {
AVIIndex* idx = &avi->indexes[stream_index];
int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
if (idx->ents_allocated <= idx->entry) {
idx->cluster = av_realloc(idx->cluster, (cl+1)*sizeof(void*));
if (!idx->cluster)
return -1;
idx->cluster[cl] = av_malloc(AVI_INDEX_CLUSTER_SIZE*sizeof(AVIIentry));
if (!idx->cluster[cl])
return -1;
idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
}
idx->cluster[cl][id].flags = flags;
idx->cluster[cl][id].pos = url_ftell(pb) - avi->movi_list;
idx->cluster[cl][id].len = size;
idx->entry++;
}
put_buffer(pb, tag, 4);
put_le32(pb, size);
put_buffer(pb, buf, size);
if (size & 1)
put_byte(pb, 0);
put_flush_packet(pb);
return 0;
}
static int avi_write_trailer(AVFormatContext *s)
{
AVIContext *avi = s->priv_data;
ByteIOContext *pb = &s->pb;
int res = 0;
int i, j, n, nb_frames;
offset_t file_size;
if (avi->riff_id == 1) {
end_tag(pb, avi->movi_list);
res = avi_write_idx1(s);
end_tag(pb, avi->riff_start);
} else {
avi_write_ix(s);
end_tag(pb, avi->movi_list);
end_tag(pb, avi->riff_start);
file_size = url_ftell(pb);
url_fseek(pb, avi->odml_list - 8, SEEK_SET);
put_tag(pb, "LIST"); /* Making this AVI OpenDML one */
url_fskip(pb, 16);
for (n=nb_frames=0;n<s->nb_streams;n++) {
AVCodecContext *stream = &s->streams[n]->codec;
if (stream->codec_type == CODEC_TYPE_VIDEO) {
if (nb_frames < stream->frame_number)
nb_frames = stream->frame_number;
} else {
if (stream->codec_id == CODEC_ID_MP2 || stream->codec_id == CODEC_ID_MP3) {
nb_frames += stream->frame_number;
}
}
}
put_le32(pb, nb_frames);
url_fseek(pb, file_size, SEEK_SET);
}
put_flush_packet(pb);
for (i=0; i<MAX_STREAMS; i++) {
for (j=0; j<avi->indexes[i].ents_allocated/AVI_INDEX_CLUSTER_SIZE; j++)
av_free(avi->indexes[i].cluster[j]);
av_free(avi->indexes[i].cluster);
avi->indexes[i].cluster = NULL;
avi->indexes[i].ents_allocated = avi->indexes[i].entry = 0;
}
return res;
}
static AVOutputFormat avi_oformat = {
"avi",
"avi format",
"video/x-msvideo",
"avi",
sizeof(AVIContext),
CODEC_ID_MP2,
CODEC_ID_MPEG4,
avi_write_header,
avi_write_packet,
avi_write_trailer,
};
int avienc_init(void)
{
av_register_output_format(&avi_oformat);
return 0;
}
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