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){
53 s->bit_rate= 800*1000;
54 s->bit_rate_tolerance= s->bit_rate*10;
57 s->rc_eq= "tex^qComp";
60 s->b_quant_factor=1.25;
61 s->b_quant_offset=1.25;
62 s->i_quant_factor=-0.8;
63 s->i_quant_offset=0.0;
67 * allocates a AVCodecContext and set it to defaults.
68 * this can be deallocated by simply calling free()
70 AVCodecContext *avcodec_alloc_context(void){
71 AVCodecContext *avctx= av_mallocz(sizeof(AVCodecContext));
73 if(avctx==NULL) return NULL;
75 avcodec_get_context_defaults(avctx);
80 int avcodec_open(AVCodecContext *avctx, AVCodec *codec)
85 avctx->frame_number = 0;
86 if (codec->priv_data_size > 0) {
87 avctx->priv_data = av_mallocz(codec->priv_data_size);
88 if (!avctx->priv_data)
91 avctx->priv_data = NULL;
93 ret = avctx->codec->init(avctx);
95 av_freep(&avctx->priv_data);
101 int avcodec_encode_audio(AVCodecContext *avctx, UINT8 *buf, int buf_size,
102 const short *samples)
106 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)samples);
107 avctx->frame_number++;
111 int avcodec_encode_video(AVCodecContext *avctx, UINT8 *buf, int buf_size,
112 const AVPicture *pict)
116 ret = avctx->codec->encode(avctx, buf, buf_size, (void *)pict);
117 avctx->frame_number++;
121 /* decode a frame. return -1 if error, otherwise return the number of
122 bytes used. If no frame could be decompressed, *got_picture_ptr is
123 zero. Otherwise, it is non zero */
124 int avcodec_decode_video(AVCodecContext *avctx, AVPicture *picture,
125 int *got_picture_ptr,
126 UINT8 *buf, int buf_size)
130 ret = avctx->codec->decode(avctx, picture, got_picture_ptr,
132 if (*got_picture_ptr)
133 avctx->frame_number++;
137 /* decode an audio frame. return -1 if error, otherwise return the
138 *number of bytes used. If no frame could be decompressed,
139 *frame_size_ptr is zero. Otherwise, it is the decompressed frame
141 int avcodec_decode_audio(AVCodecContext *avctx, INT16 *samples,
143 UINT8 *buf, int buf_size)
147 ret = avctx->codec->decode(avctx, samples, frame_size_ptr,
149 avctx->frame_number++;
153 int avcodec_close(AVCodecContext *avctx)
155 if (avctx->codec->close)
156 avctx->codec->close(avctx);
157 av_freep(&avctx->priv_data);
162 AVCodec *avcodec_find_encoder(enum CodecID id)
167 if (p->encode != NULL && p->id == id)
174 AVCodec *avcodec_find_encoder_by_name(const char *name)
179 if (p->encode != NULL && strcmp(name,p->name) == 0)
186 AVCodec *avcodec_find_decoder(enum CodecID id)
191 if (p->decode != NULL && p->id == id)
198 AVCodec *avcodec_find_decoder_by_name(const char *name)
203 if (p->decode != NULL && strcmp(name,p->name) == 0)
210 AVCodec *avcodec_find(enum CodecID id)
222 const char *pix_fmt_str[] = {
235 void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
237 const char *codec_name;
240 char channels_str[100];
244 p = avcodec_find_encoder(enc->codec_id);
246 p = avcodec_find_decoder(enc->codec_id);
249 codec_name = p->name;
250 } else if (enc->codec_name[0] != '\0') {
251 codec_name = enc->codec_name;
253 /* output avi tags */
254 if (enc->codec_type == CODEC_TYPE_VIDEO) {
255 snprintf(buf1, sizeof(buf1), "%c%c%c%c",
256 enc->codec_tag & 0xff,
257 (enc->codec_tag >> 8) & 0xff,
258 (enc->codec_tag >> 16) & 0xff,
259 (enc->codec_tag >> 24) & 0xff);
261 snprintf(buf1, sizeof(buf1), "0x%04x", enc->codec_tag);
266 switch(enc->codec_type) {
267 case CODEC_TYPE_VIDEO:
268 snprintf(buf, buf_size,
270 codec_name, enc->flags & CODEC_FLAG_HQ ? " (hq)" : "");
271 if (enc->codec_id == CODEC_ID_RAWVIDEO) {
272 snprintf(buf + strlen(buf), buf_size - strlen(buf),
274 pix_fmt_str[enc->pix_fmt]);
277 snprintf(buf + strlen(buf), buf_size - strlen(buf),
278 ", %dx%d, %0.2f fps",
279 enc->width, enc->height,
280 (float)enc->frame_rate / FRAME_RATE_BASE);
283 snprintf(buf + strlen(buf), buf_size - strlen(buf),
284 ", q=%d-%d", enc->qmin, enc->qmax);
286 bitrate = enc->bit_rate;
288 case CODEC_TYPE_AUDIO:
289 snprintf(buf, buf_size,
292 switch (enc->channels) {
294 strcpy(channels_str, "mono");
297 strcpy(channels_str, "stereo");
300 strcpy(channels_str, "5:1");
303 sprintf(channels_str, "%d channels", enc->channels);
306 if (enc->sample_rate) {
307 snprintf(buf + strlen(buf), buf_size - strlen(buf),
313 /* for PCM codecs, compute bitrate directly */
314 switch(enc->codec_id) {
315 case CODEC_ID_PCM_S16LE:
316 case CODEC_ID_PCM_S16BE:
317 case CODEC_ID_PCM_U16LE:
318 case CODEC_ID_PCM_U16BE:
319 bitrate = enc->sample_rate * enc->channels * 16;
321 case CODEC_ID_PCM_S8:
322 case CODEC_ID_PCM_U8:
323 case CODEC_ID_PCM_ALAW:
324 case CODEC_ID_PCM_MULAW:
325 bitrate = enc->sample_rate * enc->channels * 8;
328 bitrate = enc->bit_rate;
336 if (enc->flags & CODEC_FLAG_PASS1)
337 snprintf(buf + strlen(buf), buf_size - strlen(buf),
339 if (enc->flags & CODEC_FLAG_PASS2)
340 snprintf(buf + strlen(buf), buf_size - strlen(buf),
344 snprintf(buf + strlen(buf), buf_size - strlen(buf),
345 ", %d kb/s", bitrate / 1000);
349 /* Picture field are filled with 'ptr' addresses */
350 void avpicture_fill(AVPicture *picture, UINT8 *ptr,
351 int pix_fmt, int width, int height)
355 size = width * height;
357 case PIX_FMT_YUV420P:
358 picture->data[0] = ptr;
359 picture->data[1] = picture->data[0] + size;
360 picture->data[2] = picture->data[1] + size / 4;
361 picture->linesize[0] = width;
362 picture->linesize[1] = width / 2;
363 picture->linesize[2] = width / 2;
365 case PIX_FMT_YUV422P:
366 picture->data[0] = ptr;
367 picture->data[1] = picture->data[0] + size;
368 picture->data[2] = picture->data[1] + size / 2;
369 picture->linesize[0] = width;
370 picture->linesize[1] = width / 2;
371 picture->linesize[2] = width / 2;
373 case PIX_FMT_YUV444P:
374 picture->data[0] = ptr;
375 picture->data[1] = picture->data[0] + size;
376 picture->data[2] = picture->data[1] + size;
377 picture->linesize[0] = width;
378 picture->linesize[1] = width;
379 picture->linesize[2] = width;
383 picture->data[0] = ptr;
384 picture->data[1] = NULL;
385 picture->data[2] = NULL;
386 picture->linesize[0] = width * 3;
390 picture->data[0] = ptr;
391 picture->data[1] = NULL;
392 picture->data[2] = NULL;
393 picture->linesize[0] = width * 4;
396 picture->data[0] = ptr;
397 picture->data[1] = NULL;
398 picture->data[2] = NULL;
399 picture->linesize[0] = width * 2;
402 picture->data[0] = NULL;
403 picture->data[1] = NULL;
404 picture->data[2] = NULL;
409 int avpicture_get_size(int pix_fmt, int width, int height)
413 size = width * height;
415 case PIX_FMT_YUV420P:
416 size = (size * 3) / 2;
418 case PIX_FMT_YUV422P:
421 case PIX_FMT_YUV444P:
442 unsigned avcodec_version( void )
444 return LIBAVCODEC_VERSION_INT;
447 unsigned avcodec_build( void )
449 return LIBAVCODEC_BUILD;
452 /* must be called before any other functions */
453 void avcodec_init(void)
455 static int inited = 0;
464 /* this should be called after seeking and before trying to decode the next frame */
465 void avcodec_flush_buffers(AVCodecContext *avctx)
467 MpegEncContext *s = avctx->priv_data;
468 s->num_available_buffers=0;
472 static int raw_encode_init(AVCodecContext *s)
477 static int raw_decode_frame(AVCodecContext *avctx,
478 void *data, int *data_size,
479 UINT8 *buf, int buf_size)
484 static int raw_encode_frame(AVCodecContext *avctx,
485 unsigned char *frame, int buf_size, void *data)
490 AVCodec rawvideo_codec = {