3 * Copyright (c) 2001 Fabrice Bellard.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include "mpegvideo.h"
23 void *av_mallocz(int size)
26 ptr = av_malloc(size);
33 /* cannot call it directly because of 'void **' casting is not automatic */
34 void __av_freep(void **ptr)
40 /* encoder management */
41 AVCodec *first_avcodec;
43 void register_avcodec(AVCodec *format)
47 while (*p != NULL) p = &(*p)->next;
52 void avcodec_get_context_defaults(AVCodecContext *s){
55 s->rc_eq= "tex^qComp";
60 * allocates a AVCodecContext and set it to defaults.
61 * this can be deallocated by simply calling free()
63 AVCodecContext *avcodec_alloc_context(){
64 AVCodecContext *avctx= av_mallocz(sizeof(AVCodecContext));
66 if(avctx==NULL) return NULL;
68 avcodec_get_context_defaults(avctx);
73 int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
78 avctx->frame_number = 0;
79 if (codec->priv_data_size > 0) {
80 avctx->priv_data = av_mallocz(codec->priv_data_size);
81 if (!avctx->priv_data)
84 avctx->priv_data = NULL;
86 ret = avctx->codec->init(avctx);
88 av_freep(&avctx->priv_data);
94 int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size,
99 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
100 avctx->frame_number++;
104 int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size,
105 const AVPicture *pict)
109 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
110 avctx->frame_number++;
114 /* decode a frame. return -1 if error, otherwise return the number of
115 bytes used. If no frame could be decompressed, *got_picture_ptr is
116 zero. Otherwise, it is non zero */
117 int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture,
118 int *got_picture_ptr,
119 UINT8 *buf, int buf_size)
123 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
125 if (*got_picture_ptr)
126 avctx->frame_number++;
130 /* decode an audio frame. return -1 if error, otherwise return the
131 *number of bytes used. If no frame could be decompressed,
132 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
134 int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples,
136 UINT8 *buf, int buf_size)
140 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
142 avctx->frame_number++;
146 int avcodec_close(AVCodecContext *avctx)
148 if (avctx->codec->close)
149 avctx->codec->close(avctx);
150 av_freep(&avctx->priv_data);
155 AVCodec *avcodec_find_encoder(enum CodecID id)
160 if (p->encode != NULL && p->id == id)
167 AVCodec *avcodec_find_encoder_by_name(const char *name)
172 if (p->encode != NULL && strcmp(name,p->name) == 0)
179 AVCodec *avcodec_find_decoder(enum CodecID id)
184 if (p->decode != NULL && p->id == id)
191 AVCodec *avcodec_find_decoder_by_name(const char *name)
196 if (p->decode != NULL && strcmp(name,p->name) == 0)
203 AVCodec *avcodec_find(enum CodecID id)
215 const char *pix_fmt_str[] = {
228 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
230 const char *codec_name;
233 char channels_str[100];
237 p = avcodec_find_encoder(enc->codec_id);
239 p = avcodec_find_decoder(enc->codec_id);
242 codec_name = p->name;
243 } else if (enc->codec_name[0] != '\0') {
244 codec_name = enc->codec_name;
246 /* output avi tags */
247 if (enc->codec_type == CODEC_TYPE_VIDEO) {
248 snprintf(buf1, sizeof(buf1), "%c%c%c%c",
249 enc->codec_tag & 0xff,
250 (enc->codec_tag >> 8) & 0xff,
251 (enc->codec_tag >> 16) & 0xff,
252 (enc->codec_tag >> 24) & 0xff);
254 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
259 switch(enc->codec_type) {
260 case CODEC_TYPE_VIDEO:
261 snprintf(buf, buf_size,
263 codec_name, enc->flags & CODEC_FLAG_HQ ? " (hq)" : "");
264 if (enc->codec_id == CODEC_ID_RAWVIDEO) {
265 snprintf(buf + strlen(buf), buf_size - strlen(buf),
267 pix_fmt_str[enc->pix_fmt]);
270 snprintf(buf + strlen(buf), buf_size - strlen(buf),
271 ", %dx%d, %0.2f fps",
272 enc->width, enc->height,
273 (float)enc->frame_rate / FRAME_RATE_BASE);
275 snprintf(buf + strlen(buf), buf_size - strlen(buf),
276 ", q=%d-%d", enc->qmin, enc->qmax);
278 bitrate = enc->bit_rate;
280 case CODEC_TYPE_AUDIO:
281 snprintf(buf, buf_size,
284 switch (enc->channels) {
286 strcpy(channels_str, "mono");
289 strcpy(channels_str, "stereo");
292 strcpy(channels_str, "5:1");
295 sprintf(channels_str, "%d channels", enc->channels);
298 if (enc->sample_rate) {
299 snprintf(buf + strlen(buf), buf_size - strlen(buf),
305 /* for PCM codecs, compute bitrate directly */
306 switch(enc->codec_id) {
307 case CODEC_ID_PCM_S16LE:
308 case CODEC_ID_PCM_S16BE:
309 case CODEC_ID_PCM_U16LE:
310 case CODEC_ID_PCM_U16BE:
311 bitrate = enc->sample_rate * enc->channels * 16;
313 case CODEC_ID_PCM_S8:
314 case CODEC_ID_PCM_U8:
315 case CODEC_ID_PCM_ALAW:
316 case CODEC_ID_PCM_MULAW:
317 bitrate = enc->sample_rate * enc->channels * 8;
320 bitrate = enc->bit_rate;
328 snprintf(buf + strlen(buf), buf_size - strlen(buf),
329 ", %d kb/s", bitrate / 1000);
333 /* Picture field are filled with 'ptr' addresses */
334 void avpicture_fill(AVPicture *picture, UINT8 *ptr,
335 int pix_fmt, int width, int height)
339 size = width * height;
341 case PIX_FMT_YUV420P:
342 picture->data[0] = ptr;
343 picture->data[1] = picture->data[0] + size;
344 picture->data[2] = picture->data[1] + size / 4;
345 picture->linesize[0] = width;
346 picture->linesize[1] = width / 2;
347 picture->linesize[2] = width / 2;
349 case PIX_FMT_YUV422P:
350 picture->data[0] = ptr;
351 picture->data[1] = picture->data[0] + size;
352 picture->data[2] = picture->data[1] + size / 2;
353 picture->linesize[0] = width;
354 picture->linesize[1] = width / 2;
355 picture->linesize[2] = width / 2;
357 case PIX_FMT_YUV444P:
358 picture->data[0] = ptr;
359 picture->data[1] = picture->data[0] + size;
360 picture->data[2] = picture->data[1] + size;
361 picture->linesize[0] = width;
362 picture->linesize[1] = width;
363 picture->linesize[2] = width;
367 picture->data[0] = ptr;
368 picture->data[1] = NULL;
369 picture->data[2] = NULL;
370 picture->linesize[0] = width * 3;
374 picture->data[0] = ptr;
375 picture->data[1] = NULL;
376 picture->data[2] = NULL;
377 picture->linesize[0] = width * 4;
380 picture->data[0] = ptr;
381 picture->data[1] = NULL;
382 picture->data[2] = NULL;
383 picture->linesize[0] = width * 2;
386 picture->data[0] = NULL;
387 picture->data[1] = NULL;
388 picture->data[2] = NULL;
393 int avpicture_get_size(int pix_fmt, int width, int height)
397 size = width * height;
399 case PIX_FMT_YUV420P:
400 size = (size * 3) / 2;
402 case PIX_FMT_YUV422P:
405 case PIX_FMT_YUV444P:
426 unsigned avcodec_version( void )
428 return LIBAVCODEC_VERSION_INT;
431 unsigned avcodec_build( void )
433 return LIBAVCODEC_BUILD;
436 /* must be called before any other functions */
437 void avcodec_init(void)
439 static int inited = 0;
448 /* this should be called after seeking and before trying to decode the next frame */
449 void avcodec_flush_buffers(AVCodecContext *avctx)
451 MpegEncContext *s = avctx->priv_data;
452 s->num_available_buffers=0;
456 static int raw_encode_init(AVCodecContext *s)
461 static int raw_decode_frame(AVCodecContext *avctx,
462 void *data, int *data_size,
463 UINT8 *buf, int buf_size)
468 static int raw_encode_frame(AVCodecContext *avctx,
469 unsigned char *frame, int buf_size, void *data)
474 AVCodec rawvideo_codec = {