X-Git-Url: https://git.pterodactylus.net/?a=blobdiff_plain;f=synfig-core%2Ftags%2Fsynfig_0_61_03%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavcodec%2Fapiexample.c;fp=synfig-core%2Ftags%2Fsynfig_0_61_03%2Fsynfig-core%2Fsrc%2Fmodules%2Fmod_libavcodec%2Flibavcodec%2Fapiexample.c;h=0000000000000000000000000000000000000000;hb=6fa8f2f38d4b0b35f8539bf94e27ae27015c7689;hp=dd4d6dfd4de18218c706ebf897919e1cc1ffd9fb;hpb=47fce282611fbba1044921d22ca887f9b53ad91a;p=synfig.git diff --git a/synfig-core/tags/synfig_0_61_03/synfig-core/src/modules/mod_libavcodec/libavcodec/apiexample.c b/synfig-core/tags/synfig_0_61_03/synfig-core/src/modules/mod_libavcodec/libavcodec/apiexample.c deleted file mode 100644 index dd4d6df..0000000 --- a/synfig-core/tags/synfig_0_61_03/synfig-core/src/modules/mod_libavcodec/libavcodec/apiexample.c +++ /dev/null @@ -1,516 +0,0 @@ -/** - * @file apiexample.c - * avcodec API use example. - * - * Note that this library only handles codecs (mpeg, mpeg4, etc...), - * not file formats (avi, vob, etc...). See library 'libavformat' for the - * format handling - */ - -#include -#include -#include -#include - -#ifdef HAVE_AV_CONFIG_H -#undef HAVE_AV_CONFIG_H -#endif - -#include "avcodec.h" - -#define INBUF_SIZE 4096 - -/* - * Audio encoding example - */ -void audio_encode_example(const char *filename) -{ - AVCodec *codec; - AVCodecContext *c= NULL; - int frame_size, i, j, out_size, outbuf_size; - FILE *f; - short *samples; - float t, tincr; - uint8_t *outbuf; - - printf("Audio encoding\n"); - - /* find the MP2 encoder */ - codec = avcodec_find_encoder(CODEC_ID_MP2); - if (!codec) { - fprintf(stderr, "codec not found\n"); - exit(1); - } - - c= avcodec_alloc_context(); - - /* put sample parameters */ - c->bit_rate = 64000; - c->sample_rate = 44100; - c->channels = 2; - - /* open it */ - if (avcodec_open(c, codec) < 0) { - fprintf(stderr, "could not open codec\n"); - exit(1); - } - - /* the codec gives us the frame size, in samples */ - frame_size = c->frame_size; - samples = malloc(frame_size * 2 * c->channels); - outbuf_size = 10000; - outbuf = malloc(outbuf_size); - - f = fopen(filename, "w"); - if (!f) { - fprintf(stderr, "could not open %s\n", filename); - exit(1); - } - - /* encode a single tone sound */ - t = 0; - tincr = 2 * M_PI * 440.0 / c->sample_rate; - for(i=0;i<200;i++) { - for(j=0;j 0) { - len = avcodec_decode_audio(c, (short *)outbuf, &out_size, - inbuf_ptr, size); - if (len < 0) { - fprintf(stderr, "Error while decoding\n"); - exit(1); - } - if (out_size > 0) { - /* if a frame has been decoded, output it */ - fwrite(outbuf, 1, out_size, outfile); - } - size -= len; - inbuf_ptr += len; - } - } - - fclose(outfile); - fclose(f); - free(outbuf); - - avcodec_close(c); - free(c); -} - -/* - * Video encoding example - */ -void video_encode_example(const char *filename) -{ - AVCodec *codec; - AVCodecContext *c= NULL; - int i, out_size, size, x, y, outbuf_size; - FILE *f; - AVFrame *picture; - uint8_t *outbuf, *picture_buf; - - printf("Video encoding\n"); - - /* find the mpeg1 video encoder */ - codec = avcodec_find_encoder(CODEC_ID_MPEG1VIDEO); - if (!codec) { - fprintf(stderr, "codec not found\n"); - exit(1); - } - - c= avcodec_alloc_context(); - picture= avcodec_alloc_frame(); - - /* put sample parameters */ - c->bit_rate = 400000; - /* resolution must be a multiple of two */ - c->width = 352; - c->height = 288; - /* frames per second */ - c->frame_rate = 25; - c->frame_rate_base= 1; - c->gop_size = 10; /* emit one intra frame every ten frames */ - c->max_b_frames=1; - - /* open it */ - if (avcodec_open(c, codec) < 0) { - fprintf(stderr, "could not open codec\n"); - exit(1); - } - - /* the codec gives us the frame size, in samples */ - - f = fopen(filename, "w"); - if (!f) { - fprintf(stderr, "could not open %s\n", filename); - exit(1); - } - - /* alloc image and output buffer */ - outbuf_size = 100000; - outbuf = malloc(outbuf_size); - size = c->width * c->height; - picture_buf = malloc((size * 3) / 2); /* size for YUV 420 */ - - picture->data[0] = picture_buf; - picture->data[1] = picture->data[0] + size; - picture->data[2] = picture->data[1] + size / 4; - picture->linesize[0] = c->width; - picture->linesize[1] = c->width / 2; - picture->linesize[2] = c->width / 2; - - /* encode 1 second of video */ - for(i=0;i<25;i++) { - fflush(stdout); - /* prepare a dummy image */ - /* Y */ - for(y=0;yheight;y++) { - for(x=0;xwidth;x++) { - picture->data[0][y * picture->linesize[0] + x] = x + y + i * 3; - } - } - - /* Cb and Cr */ - for(y=0;yheight/2;y++) { - for(x=0;xwidth/2;x++) { - picture->data[1][y * picture->linesize[1] + x] = 128 + y + i * 2; - picture->data[2][y * picture->linesize[2] + x] = 64 + x + i * 5; - } - } - - /* encode the image */ - out_size = avcodec_encode_video(c, outbuf, outbuf_size, picture); - printf("encoding frame %3d (size=%5d)\n", i, out_size); - fwrite(outbuf, 1, out_size, f); - } - - /* get the delayed frames */ - for(; out_size; i++) { - fflush(stdout); - - out_size = avcodec_encode_video(c, outbuf, outbuf_size, NULL); - printf("write frame %3d (size=%5d)\n", i, out_size); - fwrite(outbuf, 1, out_size, f); - } - - /* add sequence end code to have a real mpeg file */ - outbuf[0] = 0x00; - outbuf[1] = 0x00; - outbuf[2] = 0x01; - outbuf[3] = 0xb7; - fwrite(outbuf, 1, 4, f); - fclose(f); - free(picture_buf); - free(outbuf); - - avcodec_close(c); - free(c); - free(picture); - printf("\n"); -} - -/* - * Video decoding example - */ - -void pgm_save(unsigned char *buf,int wrap, int xsize,int ysize,char *filename) -{ - FILE *f; - int i; - - f=fopen(filename,"w"); - fprintf(f,"P5\n%d %d\n%d\n",xsize,ysize,255); - for(i=0;icapabilities&CODEC_CAP_TRUNCATED) - c->flags|= CODEC_FLAG_TRUNCATED; /* we dont send complete frames */ - - /* for some codecs, such as msmpeg4 and mpeg4, width and height - MUST be initialized there because these info are not available - in the bitstream */ - - /* open it */ - if (avcodec_open(c, codec) < 0) { - fprintf(stderr, "could not open codec\n"); - exit(1); - } - - /* the codec gives us the frame size, in samples */ - - f = fopen(filename, "r"); - if (!f) { - fprintf(stderr, "could not open %s\n", filename); - exit(1); - } - - frame = 0; - for(;;) { - size = fread(inbuf, 1, INBUF_SIZE, f); - if (size == 0) - break; - - /* NOTE1: some codecs are stream based (mpegvideo, mpegaudio) - and this is the only method to use them because you cannot - know the compressed data size before analysing it. - - BUT some other codecs (msmpeg4, mpeg4) are inherently frame - based, so you must call them with all the data for one - frame exactly. You must also initialize 'width' and - 'height' before initializing them. */ - - /* NOTE2: some codecs allow the raw parameters (frame size, - sample rate) to be changed at any frame. We handle this, so - you should also take care of it */ - - /* here, we use a stream based decoder (mpeg1video), so we - feed decoder and see if it could decode a frame */ - inbuf_ptr = inbuf; - while (size > 0) { - len = avcodec_decode_video(c, picture, &got_picture, - inbuf_ptr, size); - if (len < 0) { - fprintf(stderr, "Error while decoding frame %d\n", frame); - exit(1); - } - if (got_picture) { - printf("saving frame %3d\n", frame); - fflush(stdout); - - /* the picture is allocated by the decoder. no need to - free it */ - snprintf(buf, sizeof(buf), outfilename, frame); - pgm_save(picture->data[0], picture->linesize[0], - c->width, c->height, buf); - frame++; - } - size -= len; - inbuf_ptr += len; - } - } - - /* some codecs, such as MPEG, transmit the I and P frame with a - latency of one frame. You must do the following to have a - chance to get the last frame of the video */ - len = avcodec_decode_video(c, picture, &got_picture, - NULL, 0); - if (got_picture) { - printf("saving last frame %3d\n", frame); - fflush(stdout); - - /* the picture is allocated by the decoder. no need to - free it */ - snprintf(buf, sizeof(buf), outfilename, frame); - pgm_save(picture->data[0], picture->linesize[0], - c->width, c->height, buf); - frame++; - } - - fclose(f); - - avcodec_close(c); - free(c); - free(picture); - printf("\n"); -} - -// simple example how the options could be used -int options_example(int argc, char* argv[]) -{ - AVCodec* codec = avcodec_find_encoder_by_name((argc > 1) ? argv[2] : "mpeg4"); - const AVOption* c; - AVCodecContext* avctx; - char* def = av_malloc(5000); - const char* col = ""; - int i = 0; - - if (!codec) - return -1; - c = codec->options; - avctx = avcodec_alloc_context(); - *def = 0; - - if (c) { - const AVOption *stack[FF_OPT_MAX_DEPTH]; - int depth = 0; - for (;;) { - if (!c->name) { - if (c->help) { - stack[depth++] = c; - c = (const AVOption*)c->help; - } else { - if (depth == 0) - break; // finished - c = stack[--depth]; - c++; - } - } else { - int t = c->type & FF_OPT_TYPE_MASK; - printf("Config %s %s\n", - t == FF_OPT_TYPE_BOOL ? "bool " : - t == FF_OPT_TYPE_DOUBLE ? "double " : - t == FF_OPT_TYPE_INT ? "integer" : - t == FF_OPT_TYPE_STRING ? "string " : - "unknown??", c->name); - switch (t) { - case FF_OPT_TYPE_BOOL: - i += sprintf(def + i, "%s%s=%s", - col, c->name, - c->defval != 0. ? "on" : "off"); - break; - case FF_OPT_TYPE_DOUBLE: - i += sprintf(def + i, "%s%s=%f", - col, c->name, c->defval); - break; - case FF_OPT_TYPE_INT: - i += sprintf(def + i, "%s%s=%d", - col, c->name, (int) c->defval); - break; - case FF_OPT_TYPE_STRING: - if (c->defstr) { - char* d = av_strdup(c->defstr); - char* f = strchr(d, ','); - if (f) - *f = 0; - i += sprintf(def + i, "%s%s=%s", - col, c->name, d); - av_free(d); - } - break; - } - col = ":"; - c++; - } - } - } - printf("Default Options: %s\n", def); - av_free(def); - return 0; -} - - -int main(int argc, char **argv) -{ - const char *filename; - - /* must be called before using avcodec lib */ - avcodec_init(); - - /* register all the codecs (you can also register only the codec - you wish to have smaller code */ - avcodec_register_all(); - -#ifdef OPT_TEST - options_example(argc, argv); -#else - if (argc <= 1) { - audio_encode_example("/tmp/test.mp2"); - audio_decode_example("/tmp/test.sw", "/tmp/test.mp2"); - - video_encode_example("/tmp/test.mpg"); - filename = "/tmp/test.mpg"; - } else { - filename = argv[1]; - } - - // audio_decode_example("/tmp/test.sw", filename); - video_decode_example("/tmp/test%d.pgm", filename); -#endif - - return 0; -}