mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-28 20:53:54 +02:00
1cb0edb40b
- Hack in MPEG-2 demux to cope with buggy VOBs. Originally committed as revision 333 to svn://svn.ffmpeg.org/ffmpeg/trunk
472 lines
12 KiB
C
472 lines
12 KiB
C
/*
|
|
* utils for libavcodec
|
|
* Copyright (c) 2001 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 <stdio.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include "common.h"
|
|
#include "dsputil.h"
|
|
#include "avcodec.h"
|
|
#ifdef HAVE_MALLOC_H
|
|
#include <malloc.h>
|
|
#else
|
|
#include <stdlib.h>
|
|
#endif
|
|
|
|
/* memory alloc */
|
|
void *av_mallocz(int size)
|
|
{
|
|
void *ptr;
|
|
#if defined ( ARCH_X86 ) && defined ( HAVE_MEMALIGN )
|
|
ptr = memalign(64,size);
|
|
/* Why 64?
|
|
Indeed, we should align it:
|
|
on 4 for 386
|
|
on 16 for 486
|
|
on 32 for 586, PPro - k6-III
|
|
on 64 for K7 (maybe for P3 too).
|
|
Because L1 and L2 caches are aligned on those values.
|
|
But I don't want to code such logic here!
|
|
*/
|
|
#else
|
|
ptr = malloc(size);
|
|
#endif
|
|
if (!ptr)
|
|
return NULL;
|
|
memset(ptr, 0, size);
|
|
return ptr;
|
|
}
|
|
|
|
/* encoder management */
|
|
AVCodec *first_avcodec;
|
|
|
|
void register_avcodec(AVCodec *format)
|
|
{
|
|
AVCodec **p;
|
|
p = &first_avcodec;
|
|
while (*p != NULL) p = &(*p)->next;
|
|
*p = format;
|
|
format->next = NULL;
|
|
}
|
|
|
|
int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
|
|
{
|
|
int ret;
|
|
|
|
avctx->codec = codec;
|
|
avctx->frame_number = 0;
|
|
avctx->priv_data = av_mallocz(codec->priv_data_size);
|
|
if (!avctx->priv_data)
|
|
return -ENOMEM;
|
|
ret = avctx->codec->init(avctx);
|
|
if (ret < 0) {
|
|
free(avctx->priv_data);
|
|
avctx->priv_data = NULL;
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size,
|
|
const short *samples)
|
|
{
|
|
int ret;
|
|
|
|
ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
|
|
avctx->frame_number++;
|
|
return ret;
|
|
}
|
|
|
|
int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size,
|
|
const AVPicture *pict)
|
|
{
|
|
int ret;
|
|
|
|
ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
|
|
avctx->frame_number++;
|
|
return ret;
|
|
}
|
|
|
|
/* decode a frame. return -1 if error, otherwise return the number of
|
|
bytes used. If no frame could be decompressed, *got_picture_ptr is
|
|
zero. Otherwise, it is non zero */
|
|
int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture,
|
|
int *got_picture_ptr,
|
|
UINT8 *buf, int buf_size)
|
|
{
|
|
int ret;
|
|
|
|
ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
|
|
buf, buf_size);
|
|
if (*got_picture_ptr)
|
|
avctx->frame_number++;
|
|
return ret;
|
|
}
|
|
|
|
/* decode an audio frame. return -1 if error, otherwise return the
|
|
*number of bytes used. If no frame could be decompressed,
|
|
*frame_size_ptr is zero. Otherwise, it is the decompressed frame
|
|
*size in BYTES. */
|
|
int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples,
|
|
int *frame_size_ptr,
|
|
UINT8 *buf, int buf_size)
|
|
{
|
|
int ret;
|
|
|
|
ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
|
|
buf, buf_size);
|
|
avctx->frame_number++;
|
|
return ret;
|
|
}
|
|
|
|
int avcodec_close(AVCodecContext *avctx)
|
|
{
|
|
if (avctx->codec->close)
|
|
avctx->codec->close(avctx);
|
|
free(avctx->priv_data);
|
|
avctx->priv_data = NULL;
|
|
avctx->codec = NULL;
|
|
return 0;
|
|
}
|
|
|
|
AVCodec *avcodec_find_encoder(enum CodecID id)
|
|
{
|
|
AVCodec *p;
|
|
p = first_avcodec;
|
|
while (p) {
|
|
if (p->encode != NULL && p->id == id)
|
|
return p;
|
|
p = p->next;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
AVCodec *avcodec_find_encoder_by_name(const char *name)
|
|
{
|
|
AVCodec *p;
|
|
p = first_avcodec;
|
|
while (p) {
|
|
if (p->encode != NULL && strcmp(name,p->name) == 0)
|
|
return p;
|
|
p = p->next;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
AVCodec *avcodec_find_decoder(enum CodecID id)
|
|
{
|
|
AVCodec *p;
|
|
p = first_avcodec;
|
|
while (p) {
|
|
if (p->decode != NULL && p->id == id)
|
|
return p;
|
|
p = p->next;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
AVCodec *avcodec_find_decoder_by_name(const char *name)
|
|
{
|
|
AVCodec *p;
|
|
p = first_avcodec;
|
|
while (p) {
|
|
if (p->decode != NULL && strcmp(name,p->name) == 0)
|
|
return p;
|
|
p = p->next;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
AVCodec *avcodec_find(enum CodecID id)
|
|
{
|
|
AVCodec *p;
|
|
p = first_avcodec;
|
|
while (p) {
|
|
if (p->id == id)
|
|
return p;
|
|
p = p->next;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
const char *pix_fmt_str[] = {
|
|
"yuv420p",
|
|
"yuv422",
|
|
"rgb24",
|
|
"bgr24",
|
|
"yuv422p",
|
|
"yuv444p",
|
|
};
|
|
|
|
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
|
|
{
|
|
const char *codec_name;
|
|
AVCodec *p;
|
|
char buf1[32];
|
|
int bitrate;
|
|
|
|
if (encode)
|
|
p = avcodec_find_encoder(enc->codec_id);
|
|
else
|
|
p = avcodec_find_decoder(enc->codec_id);
|
|
|
|
if (p) {
|
|
codec_name = p->name;
|
|
} else if (enc->codec_name[0] != '\0') {
|
|
codec_name = enc->codec_name;
|
|
} else {
|
|
/* output avi tags */
|
|
if (enc->codec_type == CODEC_TYPE_VIDEO) {
|
|
snprintf(buf1, sizeof(buf1), "%c%c%c%c",
|
|
enc->codec_tag & 0xff,
|
|
(enc->codec_tag >> 8) & 0xff,
|
|
(enc->codec_tag >> 16) & 0xff,
|
|
(enc->codec_tag >> 24) & 0xff);
|
|
} else {
|
|
snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
|
|
}
|
|
codec_name = buf1;
|
|
}
|
|
|
|
switch(enc->codec_type) {
|
|
case CODEC_TYPE_VIDEO:
|
|
snprintf(buf, buf_size,
|
|
"Video: %s%s",
|
|
codec_name, enc->flags & CODEC_FLAG_HQ ? " (hq)" : "");
|
|
if (enc->codec_id == CODEC_ID_RAWVIDEO) {
|
|
snprintf(buf + strlen(buf), buf_size - strlen(buf),
|
|
", %s",
|
|
pix_fmt_str[enc->pix_fmt]);
|
|
}
|
|
if (enc->width) {
|
|
snprintf(buf + strlen(buf), buf_size - strlen(buf),
|
|
", %dx%d, %0.2f fps",
|
|
enc->width, enc->height,
|
|
(float)enc->frame_rate / FRAME_RATE_BASE);
|
|
}
|
|
bitrate = enc->bit_rate;
|
|
break;
|
|
case CODEC_TYPE_AUDIO:
|
|
snprintf(buf, buf_size,
|
|
"Audio: %s",
|
|
codec_name);
|
|
if (enc->sample_rate) {
|
|
snprintf(buf + strlen(buf), buf_size - strlen(buf),
|
|
", %d Hz, %s",
|
|
enc->sample_rate,
|
|
enc->channels == 2 ? "stereo" : "mono");
|
|
}
|
|
/* for PCM codecs, compute bitrate directly */
|
|
switch(enc->codec_id) {
|
|
case CODEC_ID_PCM_S16LE:
|
|
case CODEC_ID_PCM_S16BE:
|
|
case CODEC_ID_PCM_U16LE:
|
|
case CODEC_ID_PCM_U16BE:
|
|
bitrate = enc->sample_rate * enc->channels * 16;
|
|
break;
|
|
case CODEC_ID_PCM_S8:
|
|
case CODEC_ID_PCM_U8:
|
|
case CODEC_ID_PCM_ALAW:
|
|
case CODEC_ID_PCM_MULAW:
|
|
bitrate = enc->sample_rate * enc->channels * 8;
|
|
break;
|
|
default:
|
|
bitrate = enc->bit_rate;
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
if (bitrate != 0) {
|
|
snprintf(buf + strlen(buf), buf_size - strlen(buf),
|
|
", %d kb/s", bitrate / 1000);
|
|
}
|
|
}
|
|
|
|
/* Picture field are filled with 'ptr' addresses */
|
|
void avpicture_fill(AVPicture *picture, UINT8 *ptr,
|
|
int pix_fmt, int width, int height)
|
|
{
|
|
int size;
|
|
|
|
size = width * height;
|
|
switch(pix_fmt) {
|
|
case PIX_FMT_YUV420P:
|
|
picture->data[0] = ptr;
|
|
picture->data[1] = picture->data[0] + size;
|
|
picture->data[2] = picture->data[1] + size / 4;
|
|
picture->linesize[0] = width;
|
|
picture->linesize[1] = width / 2;
|
|
picture->linesize[2] = width / 2;
|
|
break;
|
|
case PIX_FMT_YUV422P:
|
|
picture->data[0] = ptr;
|
|
picture->data[1] = picture->data[0] + size;
|
|
picture->data[2] = picture->data[1] + size / 2;
|
|
picture->linesize[0] = width;
|
|
picture->linesize[1] = width / 2;
|
|
picture->linesize[2] = width / 2;
|
|
break;
|
|
case PIX_FMT_YUV444P:
|
|
picture->data[0] = ptr;
|
|
picture->data[1] = picture->data[0] + size;
|
|
picture->data[2] = picture->data[1] + size;
|
|
picture->linesize[0] = width;
|
|
picture->linesize[1] = width;
|
|
picture->linesize[2] = width;
|
|
break;
|
|
case PIX_FMT_RGB24:
|
|
case PIX_FMT_BGR24:
|
|
picture->data[0] = ptr;
|
|
picture->data[1] = NULL;
|
|
picture->data[2] = NULL;
|
|
picture->linesize[0] = width * 3;
|
|
break;
|
|
case PIX_FMT_YUV422:
|
|
picture->data[0] = ptr;
|
|
picture->data[1] = NULL;
|
|
picture->data[2] = NULL;
|
|
picture->linesize[0] = width * 2;
|
|
break;
|
|
default:
|
|
picture->data[0] = NULL;
|
|
picture->data[1] = NULL;
|
|
picture->data[2] = NULL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
int avpicture_get_size(int pix_fmt, int width, int height)
|
|
{
|
|
int size;
|
|
|
|
size = width * height;
|
|
switch(pix_fmt) {
|
|
case PIX_FMT_YUV420P:
|
|
size = (size * 3) / 2;
|
|
break;
|
|
case PIX_FMT_YUV422P:
|
|
size = (size * 2);
|
|
break;
|
|
case PIX_FMT_YUV444P:
|
|
size = (size * 3);
|
|
break;
|
|
case PIX_FMT_RGB24:
|
|
case PIX_FMT_BGR24:
|
|
size = (size * 3);
|
|
break;
|
|
case PIX_FMT_YUV422:
|
|
size = (size * 2);
|
|
break;
|
|
default:
|
|
size = -1;
|
|
break;
|
|
}
|
|
return size;
|
|
}
|
|
|
|
|
|
/* must be called before any other functions */
|
|
void avcodec_init(void)
|
|
{
|
|
dsputil_init();
|
|
}
|
|
|
|
/* simple call to use all the codecs */
|
|
void avcodec_register_all(void)
|
|
{
|
|
/* encoders */
|
|
#ifdef CONFIG_ENCODERS
|
|
register_avcodec(&ac3_encoder);
|
|
register_avcodec(&mp2_encoder);
|
|
#ifdef CONFIG_MP3LAME
|
|
register_avcodec(&mp3lame_encoder);
|
|
#endif
|
|
register_avcodec(&mpeg1video_encoder);
|
|
register_avcodec(&h263_encoder);
|
|
register_avcodec(&h263p_encoder);
|
|
register_avcodec(&rv10_encoder);
|
|
register_avcodec(&mjpeg_encoder);
|
|
register_avcodec(&mpeg4_encoder);
|
|
register_avcodec(&msmpeg4_encoder);
|
|
#endif /* CONFIG_ENCODERS */
|
|
register_avcodec(&rawvideo_codec);
|
|
|
|
/* decoders */
|
|
#ifdef CONFIG_DECODERS
|
|
register_avcodec(&h263_decoder);
|
|
register_avcodec(&mpeg4_decoder);
|
|
register_avcodec(&msmpeg4_decoder);
|
|
register_avcodec(&mpeg_decoder);
|
|
register_avcodec(&h263i_decoder);
|
|
register_avcodec(&rv10_decoder);
|
|
register_avcodec(&mjpeg_decoder);
|
|
register_avcodec(&mp3_decoder);
|
|
#ifdef CONFIG_AC3
|
|
register_avcodec(&ac3_decoder);
|
|
#endif
|
|
#endif /* CONFIG_DECODERS */
|
|
|
|
/* pcm codecs */
|
|
|
|
#define PCM_CODEC(id, name) \
|
|
register_avcodec(& name ## _encoder); \
|
|
register_avcodec(& name ## _decoder); \
|
|
|
|
PCM_CODEC(CODEC_ID_PCM_S16LE, pcm_s16le);
|
|
PCM_CODEC(CODEC_ID_PCM_S16BE, pcm_s16be);
|
|
PCM_CODEC(CODEC_ID_PCM_U16LE, pcm_u16le);
|
|
PCM_CODEC(CODEC_ID_PCM_U16BE, pcm_u16be);
|
|
PCM_CODEC(CODEC_ID_PCM_S8, pcm_s8);
|
|
PCM_CODEC(CODEC_ID_PCM_U8, pcm_u8);
|
|
PCM_CODEC(CODEC_ID_PCM_ALAW, pcm_alaw);
|
|
PCM_CODEC(CODEC_ID_PCM_MULAW, pcm_mulaw);
|
|
|
|
#undef PCM_CODEC
|
|
}
|
|
|
|
static int encode_init(AVCodecContext *s)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int decode_frame(AVCodecContext *avctx,
|
|
void *data, int *data_size,
|
|
UINT8 *buf, int buf_size)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
static int encode_frame(AVCodecContext *avctx,
|
|
unsigned char *frame, int buf_size, void *data)
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
AVCodec rawvideo_codec = {
|
|
"rawvideo",
|
|
CODEC_TYPE_VIDEO,
|
|
CODEC_ID_RAWVIDEO,
|
|
0,
|
|
encode_init,
|
|
encode_frame,
|
|
NULL,
|
|
decode_frame,
|
|
};
|