mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-15 03:34:56 +00:00
341 lines
9.2 KiB
C
341 lines
9.2 KiB
C
/*
|
|
* AVI encoder.
|
|
* Copyright (c) 2000 Gerard Lantau.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program 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 General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
#include "avformat.h"
|
|
#include "avi.h"
|
|
|
|
/*
|
|
* TODO:
|
|
* - fill all fields if non streamed (nb_frames for example)
|
|
*/
|
|
|
|
typedef struct AVIIndex {
|
|
unsigned char tag[4];
|
|
unsigned int flags, pos, len;
|
|
struct AVIIndex *next;
|
|
} AVIIndex;
|
|
|
|
typedef struct {
|
|
offset_t movi_list;
|
|
AVIIndex *first, *last;
|
|
} AVIContext;
|
|
|
|
offset_t start_tag(ByteIOContext *pb, 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)(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. */
|
|
CodecTag codec_bmp_tags[] = {
|
|
{ CODEC_ID_H263, MKTAG('U', '2', '6', '3') },
|
|
{ CODEC_ID_H263P, MKTAG('U', '2', '6', '3') },
|
|
{ CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
|
|
{ CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
|
|
{ CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') },
|
|
{ CODEC_ID_MPEG4, MKTAG('d', 'i', 'v', 'x') },
|
|
{ CODEC_ID_MPEG4, MKTAG(0x04, 0, 0, 0) }, /* some broken avi use this */
|
|
{ CODEC_ID_MSMPEG4, MKTAG('D', 'I', 'V', '3') }, /* default signature when using MSMPEG4 */
|
|
{ CODEC_ID_MSMPEG4, MKTAG('M', 'P', '4', '3') },
|
|
{ 0, 0 },
|
|
};
|
|
|
|
unsigned int codec_get_tag(CodecTag *tags, int id)
|
|
{
|
|
while (tags->id != 0) {
|
|
if (tags->id == id)
|
|
return tags->tag;
|
|
tags++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int codec_get_id(CodecTag *tags, unsigned int tag)
|
|
{
|
|
while (tags->id != 0) {
|
|
if (tags->tag == tag)
|
|
return tags->id;
|
|
tags++;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
unsigned int codec_get_bmp_tag(int id)
|
|
{
|
|
return codec_get_tag(codec_bmp_tags, id);
|
|
}
|
|
|
|
/* BITMAPINFOHEADER header */
|
|
void put_bmp_header(ByteIOContext *pb, AVCodecContext *enc)
|
|
{
|
|
put_le32(pb, 40); /* size */
|
|
put_le32(pb, enc->width);
|
|
put_le32(pb, enc->height);
|
|
put_le16(pb, 1); /* planes */
|
|
put_le16(pb, 24); /* depth */
|
|
/* compression type */
|
|
put_le32(pb, codec_get_bmp_tag(enc->codec_id));
|
|
put_le32(pb, enc->width * enc->height * 3);
|
|
put_le32(pb, 0);
|
|
put_le32(pb, 0);
|
|
put_le32(pb, 0);
|
|
put_le32(pb, 0);
|
|
}
|
|
|
|
static int avi_write_header(AVFormatContext *s)
|
|
{
|
|
AVIContext *avi;
|
|
ByteIOContext *pb = &s->pb;
|
|
int bitrate, n, i, nb_frames;
|
|
AVCodecContext *stream, *video_enc;
|
|
offset_t list1, list2, strh, strf;
|
|
|
|
avi = malloc(sizeof(AVIContext));
|
|
if (!avi)
|
|
return -1;
|
|
memset(avi, 0, sizeof(AVIContext));
|
|
s->priv_data = avi;
|
|
|
|
put_tag(pb, "RIFF");
|
|
put_le32(pb, 0); /* file length */
|
|
put_tag(pb, "AVI ");
|
|
|
|
/* header list */
|
|
list1 = start_tag(pb, "LIST");
|
|
put_tag(pb, "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;
|
|
}
|
|
|
|
if (!video_enc) {
|
|
free(avi);
|
|
return -1;
|
|
}
|
|
nb_frames = 0;
|
|
|
|
put_le32(pb, (UINT32)(INT64_C(1000000) * FRAME_RATE_BASE / video_enc->frame_rate));
|
|
put_le32(pb, bitrate / 8); /* XXX: not quite exact */
|
|
put_le32(pb, 0); /* padding */
|
|
put_le32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
|
|
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 */
|
|
put_le32(pb, video_enc->width);
|
|
put_le32(pb, video_enc->height);
|
|
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;
|
|
|
|
/* stream generic header */
|
|
strh = start_tag(pb, "strh");
|
|
switch(stream->codec_type) {
|
|
case CODEC_TYPE_VIDEO:
|
|
put_tag(pb, "vids");
|
|
put_le32(pb, codec_get_bmp_tag(stream->codec_id));
|
|
put_le32(pb, 0); /* flags */
|
|
put_le16(pb, 0); /* priority */
|
|
put_le16(pb, 0); /* language */
|
|
put_le32(pb, 0); /* initial frame */
|
|
put_le32(pb, 1000); /* scale */
|
|
put_le32(pb, (1000 * stream->frame_rate) / FRAME_RATE_BASE); /* rate */
|
|
put_le32(pb, 0); /* start */
|
|
put_le32(pb, nb_frames); /* length, XXX: fill later */
|
|
put_le32(pb, 1024 * 1024); /* suggested buffer size */
|
|
put_le32(pb, 10000); /* 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, 0);
|
|
put_le32(pb, 0); /* flags */
|
|
put_le16(pb, 0); /* priority */
|
|
put_le16(pb, 0); /* language */
|
|
put_le32(pb, 0); /* initial frame */
|
|
put_le32(pb, 1); /* scale */
|
|
put_le32(pb, stream->bit_rate / 8); /* rate */
|
|
put_le32(pb, 0); /* start */
|
|
put_le32(pb, 0); /* length, XXX: filled later */
|
|
put_le32(pb, 12 * 1024); /* suggested buffer size */
|
|
put_le32(pb, -1); /* quality */
|
|
put_le32(pb, 1); /* sample size */
|
|
put_le32(pb, 0);
|
|
put_le32(pb, 0);
|
|
break;
|
|
}
|
|
end_tag(pb, strh);
|
|
|
|
strf = start_tag(pb, "strf");
|
|
switch(stream->codec_type) {
|
|
case CODEC_TYPE_VIDEO:
|
|
put_bmp_header(pb, stream);
|
|
break;
|
|
case CODEC_TYPE_AUDIO:
|
|
if (put_wav_header(pb, stream) < 0) {
|
|
free(avi);
|
|
return -1;
|
|
}
|
|
break;
|
|
}
|
|
end_tag(pb, strf);
|
|
end_tag(pb, list2);
|
|
}
|
|
|
|
end_tag(pb, list1);
|
|
|
|
avi->movi_list = start_tag(pb, "LIST");
|
|
avi->first = NULL;
|
|
avi->last = NULL;
|
|
put_tag(pb, "movi");
|
|
|
|
put_flush_packet(pb);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int avi_write_packet(AVFormatContext *s, int stream_index,
|
|
UINT8 *buf, int size)
|
|
{
|
|
AVIContext *avi = s->priv_data;
|
|
ByteIOContext *pb = &s->pb;
|
|
AVIIndex *idx;
|
|
unsigned char tag[5];
|
|
unsigned int flags;
|
|
AVCodecContext *enc;
|
|
|
|
enc = &s->streams[stream_index]->codec;
|
|
|
|
tag[0] = '0';
|
|
tag[1] = '0' + stream_index;
|
|
if (enc->codec_type == CODEC_TYPE_VIDEO) {
|
|
tag[2] = 'd';
|
|
tag[3] = 'c';
|
|
flags = enc->key_frame ? 0x10 : 0x00;
|
|
} else {
|
|
tag[2] = 'w';
|
|
tag[3] = 'b';
|
|
flags = 0x10;
|
|
}
|
|
|
|
if (!url_is_streamed(&s->pb)) {
|
|
idx = malloc(sizeof(AVIIndex));
|
|
memcpy(idx->tag, tag, 4);
|
|
idx->flags = flags;
|
|
idx->pos = url_ftell(pb) - avi->movi_list;
|
|
idx->len = size;
|
|
idx->next = NULL;
|
|
if (!avi->last)
|
|
avi->first = idx;
|
|
else
|
|
avi->last->next = idx;
|
|
avi->last = idx;
|
|
}
|
|
|
|
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)
|
|
{
|
|
ByteIOContext *pb = &s->pb;
|
|
AVIContext *avi = s->priv_data;
|
|
offset_t file_size, idx_chunk;
|
|
AVIIndex *idx;
|
|
|
|
if (!url_is_streamed(&s->pb)) {
|
|
end_tag(pb, avi->movi_list);
|
|
|
|
idx_chunk = start_tag(pb, "idx1");
|
|
idx = avi->first;
|
|
while (idx != NULL) {
|
|
put_buffer(pb, idx->tag, 4);
|
|
put_le32(pb, idx->flags);
|
|
put_le32(pb, idx->pos);
|
|
put_le32(pb, idx->len);
|
|
idx = idx->next;
|
|
}
|
|
end_tag(pb, idx_chunk);
|
|
|
|
/* update file size */
|
|
file_size = url_ftell(pb);
|
|
url_fseek(pb, 4, SEEK_SET);
|
|
put_le32(pb, (UINT32)(file_size - 8));
|
|
url_fseek(pb, file_size, SEEK_SET);
|
|
}
|
|
put_flush_packet(pb);
|
|
|
|
free(avi);
|
|
return 0;
|
|
}
|
|
|
|
AVFormat avi_format = {
|
|
"avi",
|
|
"avi format",
|
|
"video/x-msvideo",
|
|
"avi",
|
|
CODEC_ID_MP2,
|
|
CODEC_ID_MSMPEG4,
|
|
avi_write_header,
|
|
avi_write_packet,
|
|
avi_write_trailer,
|
|
|
|
avi_read_header,
|
|
avi_read_packet,
|
|
avi_read_close,
|
|
};
|