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-rw-r--r--rotord/av/avCodec.cpp574
-rw-r--r--rotord/av/avCodec.d66
-rw-r--r--rotord/av/avCodec.h35
-rw-r--r--rotord/av/avCodec.obin0 -> 183784 bytes
4 files changed, 675 insertions, 0 deletions
diff --git a/rotord/av/avCodec.cpp b/rotord/av/avCodec.cpp
new file mode 100644
index 0000000..61c201b
--- /dev/null
+++ b/rotord/av/avCodec.cpp
@@ -0,0 +1,574 @@
+#include "avCodec.h"
+
+#define INBUF_SIZE 4096
+#define AUDIO_INBUF_SIZE 20480
+#define AUDIO_REFILL_THRESH 4096
+
+/* check that a given sample format is supported by the encoder */
+static int avCodec::check_sample_fmt(AVCodec *codec, enum AVSampleFormat sample_fmt)
+{
+ const enum AVSampleFormat *p = codec->sample_fmts;
+
+ while (*p != AV_SAMPLE_FMT_NONE) {
+ if (*p == sample_fmt)
+ return 1;
+ p++;
+ }
+ return 0;
+}
+
+/* just pick the highest supported samplerate */
+static int avCodec::select_sample_rate(AVCodec *codec)
+{
+ const int *p;
+ int best_samplerate = 0;
+
+ if (!codec->supported_samplerates)
+ return 44100;
+
+ p = codec->supported_samplerates;
+ while (*p) {
+ best_samplerate = FFMAX(*p, best_samplerate);
+ p++;
+ }
+ return best_samplerate;
+}
+
+/* select layout with the highest channel count */
+static int avCodec::select_channel_layout(AVCodec *codec)
+{
+ const uint64_t *p;
+ uint64_t best_ch_layout = 0;
+ int best_nb_channells = 0;
+
+ if (!codec->channel_layouts)
+ return AV_CH_LAYOUT_STEREO;
+
+ p = codec->channel_layouts;
+ while (*p) {
+ int nb_channels = av_get_channel_layout_nb_channels(*p);
+
+ if (nb_channels > best_nb_channells) {
+ best_ch_layout = *p;
+ best_nb_channells = nb_channels;
+ }
+ p++;
+ }
+ return best_ch_layout;
+}
+
+/*
+ * Audio encoding example
+ */
+static void avCodec::audio_encode_example(const char *filename)
+{
+ AVCodec *codec;
+ AVCodecContext *c= NULL;
+ AVFrame *frame;
+ AVPacket pkt;
+ int i, j, k, ret, got_output;
+ int buffer_size;
+ FILE *f;
+ uint16_t *samples;
+ float t, tincr;
+
+ printf("Encode audio file %s\n", filename);
+
+ /* find the MP2 encoder */
+ codec = avcodec_find_encoder(AV_CODEC_ID_MP2);
+ if (!codec) {
+ fprintf(stderr, "Codec not found\n");
+ exit(1);
+ }
+
+ c = avcodec_alloc_context3(codec);
+ if (!c) {
+ fprintf(stderr, "Could not allocate audio codec context\n");
+ exit(1);
+ }
+
+ /* put sample parameters */
+ c->bit_rate = 64000;
+
+ /* check that the encoder supports s16 pcm input */
+ c->sample_fmt = AV_SAMPLE_FMT_S16;
+ if (!check_sample_fmt(codec, c->sample_fmt)) {
+ fprintf(stderr, "Encoder does not support sample format %s",
+ av_get_sample_fmt_name(c->sample_fmt));
+ exit(1);
+ }
+
+ /* select other audio parameters supported by the encoder */
+ c->sample_rate = select_sample_rate(codec);
+ c->channel_layout = select_channel_layout(codec);
+ c->channels = av_get_channel_layout_nb_channels(c->channel_layout);
+
+ /* open it */
+ if (avcodec_open2(c, codec, NULL) < 0) {
+ fprintf(stderr, "Could not open codec\n");
+ exit(1);
+ }
+
+ f = fopen(filename, "wb");
+ if (!f) {
+ fprintf(stderr, "Could not open %s\n", filename);
+ exit(1);
+ }
+
+ /* frame containing input raw audio */
+ frame = avcodec_alloc_frame();
+ if (!frame) {
+ fprintf(stderr, "Could not allocate audio frame\n");
+ exit(1);
+ }
+
+ frame->nb_samples = c->frame_size;
+ frame->format = c->sample_fmt;
+ frame->channel_layout = c->channel_layout;
+
+ /* the codec gives us the frame size, in samples,
+ * we calculate the size of the samples buffer in bytes */
+ buffer_size = av_samples_get_buffer_size(NULL, c->channels, c->frame_size,
+ c->sample_fmt, 0);
+ samples = (uint16_t*)av_malloc(buffer_size);
+ if (!samples) {
+ fprintf(stderr, "Could not allocate %d bytes for samples buffer\n",
+ buffer_size);
+ exit(1);
+ }
+ /* setup the data pointers in the AVFrame */
+ ret = avcodec_fill_audio_frame(frame, c->channels, c->sample_fmt,
+ (const uint8_t*)samples, buffer_size, 0);
+ if (ret < 0) {
+ fprintf(stderr, "Could not setup audio frame\n");
+ exit(1);
+ }
+
+ /* encode a single tone sound */
+ t = 0;
+ tincr = 2 * M_PI * 440.0 / c->sample_rate;
+ for(i=0;i<200;i++) {
+ av_init_packet(&pkt);
+ pkt.data = NULL; // packet data will be allocated by the encoder
+ pkt.size = 0;
+
+ for (j = 0; j < c->frame_size; j++) {
+ samples[2*j] = (int)(sin(t) * 10000);
+
+ for (k = 1; k < c->channels; k++)
+ samples[2*j + k] = samples[2*j];
+ t += tincr;
+ }
+ /* encode the samples */
+ ret = avcodec_encode_audio2(c, &pkt, frame, &got_output);
+ if (ret < 0) {
+ fprintf(stderr, "Error encoding audio frame\n");
+ exit(1);
+ }
+ if (got_output) {
+ fwrite(pkt.data, 1, pkt.size, f);
+ av_free_packet(&pkt);
+ }
+ }
+
+ /* get the delayed frames */
+ for (got_output = 1; got_output; i++) {
+ ret = avcodec_encode_audio2(c, &pkt, NULL, &got_output);
+ if (ret < 0) {
+ fprintf(stderr, "Error encoding frame\n");
+ exit(1);
+ }
+
+ if (got_output) {
+ fwrite(pkt.data, 1, pkt.size, f);
+ av_free_packet(&pkt);
+ }
+ }
+ fclose(f);
+
+ av_freep(&samples);
+ avcodec_free_frame(&frame);
+ avcodec_close(c);
+ av_free(c);
+}
+
+/*
+ * Audio decoding.
+ */
+static void avCodec::audio_decode_example(const char *outfilename, const char *filename)
+{
+ AVCodec *codec;
+ AVCodecContext *c= NULL;
+ int len;
+ FILE *f, *outfile;
+ uint8_t inbuf[AUDIO_INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
+ AVPacket avpkt;
+ AVFrame *decoded_frame = NULL;
+
+ av_init_packet(&avpkt);
+
+ printf("Decode audio file %s to %s\n", filename, outfilename);
+
+ /* find the mpeg audio decoder */
+ codec = avcodec_find_decoder(AV_CODEC_ID_MP2);
+ if (!codec) {
+ fprintf(stderr, "Codec not found\n");
+ exit(1);
+ }
+
+ c = avcodec_alloc_context3(codec);
+ if (!c) {
+ fprintf(stderr, "Could not allocate audio codec context\n");
+ exit(1);
+ }
+
+ /* open it */
+ if (avcodec_open2(c, codec, NULL) < 0) {
+ fprintf(stderr, "Could not open codec\n");
+ exit(1);
+ }
+
+ f = fopen(filename, "rb");
+ if (!f) {
+ fprintf(stderr, "Could not open %s\n", filename);
+ exit(1);
+ }
+ outfile = fopen(outfilename, "wb");
+ if (!outfile) {
+ av_free(c);
+ exit(1);
+ }
+
+ /* decode until eof */
+ avpkt.data = inbuf;
+ avpkt.size = fread(inbuf, 1, AUDIO_INBUF_SIZE, f);
+
+ while (avpkt.size > 0) {
+ int got_frame = 0;
+
+ if (!decoded_frame) {
+ if (!(decoded_frame = avcodec_alloc_frame())) {
+ fprintf(stderr, "Could not allocate audio frame\n");
+ exit(1);
+ }
+ } else
+ avcodec_get_frame_defaults(decoded_frame);
+
+ len = avcodec_decode_audio4(c, decoded_frame, &got_frame, &avpkt);
+ if (len < 0) {
+ fprintf(stderr, "Error while decoding\n");
+ exit(1);
+ }
+ if (got_frame) {
+ /* if a frame has been decoded, output it */
+ int data_size = av_samples_get_buffer_size(NULL, c->channels,
+ decoded_frame->nb_samples,
+ c->sample_fmt, 1);
+ fwrite(decoded_frame->data[0], 1, data_size, outfile);
+ }
+ avpkt.size -= len;
+ avpkt.data += len;
+ avpkt.dts =
+ avpkt.pts = AV_NOPTS_VALUE;
+ if (avpkt.size < AUDIO_REFILL_THRESH) {
+ /* Refill the input buffer, to avoid trying to decode
+ * incomplete frames. Instead of this, one could also use
+ * a parser, or use a proper container format through
+ * libavformat. */
+ memmove(inbuf, avpkt.data, avpkt.size);
+ avpkt.data = inbuf;
+ len = fread(avpkt.data + avpkt.size, 1,
+ AUDIO_INBUF_SIZE - avpkt.size, f);
+ if (len > 0)
+ avpkt.size += len;
+ }
+ }
+
+ fclose(outfile);
+ fclose(f);
+
+ avcodec_close(c);
+ av_free(c);
+ avcodec_free_frame(&decoded_frame);
+}
+
+/*
+ * Video encoding example
+ */
+static void avCodec::video_encode_example(const char *filename, int codec_id)
+{
+ AVCodec *codec;
+ AVCodecContext *c= NULL;
+ int i, ret, x, y, got_output;
+ FILE *f;
+ AVFrame *frame;
+ AVPacket pkt;
+ uint8_t endcode[] = { 0, 0, 1, 0xb7 };
+
+ printf("Encode video file %s\n", filename);
+
+ /* find the mpeg1 video encoder */
+ codec =avcodec_find_encoder(codec_id);
+ if (!codec) {
+ fprintf(stderr, "Codec not found\n");
+ exit(1);
+ }
+
+ c = avcodec_alloc_context3(codec);
+ if (!c) {
+ fprintf(stderr, "Could not allocate video codec context\n");
+ exit(1);
+ }
+
+ /* put sample parameters */
+ c->bit_rate = 400000;
+ /* resolution must be a multiple of two */
+ c->width = 352;
+ c->height = 288;
+ /* frames per second */
+ c->time_base= (AVRational){1,25};
+ c->gop_size = 10; /* emit one intra frame every ten frames */
+ c->max_b_frames=1;
+ c->pix_fmt = AV_PIX_FMT_YUV420P;
+
+ if(codec_id == AV_CODEC_ID_H264)
+ av_opt_set(c->priv_data, "preset", "slow", 0);
+
+ /* open it */
+ if (avcodec_open2(c, codec, NULL) < 0) {
+ fprintf(stderr, "Could not open codec\n");
+ exit(1);
+ }
+
+ f = fopen(filename, "wb");
+ if (!f) {
+ fprintf(stderr, "Could not open %s\n", filename);
+ exit(1);
+ }
+
+ frame = avcodec_alloc_frame();
+ if (!frame) {
+ fprintf(stderr, "Could not allocate video frame\n");
+ exit(1);
+ }
+ frame->format = c->pix_fmt;
+ frame->width = c->width;
+ frame->height = c->height;
+
+ /* the image can be allocated by any means and av_image_alloc() is
+ * just the most convenient way if av_malloc() is to be used */
+ ret = av_image_alloc(frame->data, frame->linesize, c->width, c->height,
+ c->pix_fmt, 32);
+ if (ret < 0) {
+ fprintf(stderr, "Could not allocate raw picture buffer\n");
+ exit(1);
+ }
+
+ /* encode 1 second of video */
+ for(i=0;i<25;i++) {
+ av_init_packet(&pkt);
+ pkt.data = NULL; // packet data will be allocated by the encoder
+ pkt.size = 0;
+
+ fflush(stdout);
+ /* prepare a dummy image */
+ /* Y */
+ for(y=0;y<c->height;y++) {
+ for(x=0;x<c->width;x++) {
+ frame->data[0][y * frame->linesize[0] + x] = x + y + i * 3;
+ }
+ }
+
+ /* Cb and Cr */
+ for(y=0;y<c->height/2;y++) {
+ for(x=0;x<c->width/2;x++) {
+ frame->data[1][y * frame->linesize[1] + x] = 128 + y + i * 2;
+ frame->data[2][y * frame->linesize[2] + x] = 64 + x + i * 5;
+ }
+ }
+
+ frame->pts = i;
+
+ /* encode the image */
+ ret = avcodec_encode_video2(c, &pkt, frame, &got_output);
+ if (ret < 0) {
+ fprintf(stderr, "Error encoding frame\n");
+ exit(1);
+ }
+
+ if (got_output) {
+ printf("Write frame %3d (size=%5d)\n", i, pkt.size);
+ fwrite(pkt.data, 1, pkt.size, f);
+ av_free_packet(&pkt);
+ }
+ }
+
+ /* get the delayed frames */
+ for (got_output = 1; got_output; i++) {
+ fflush(stdout);
+
+ ret = avcodec_encode_video2(c, &pkt, NULL, &got_output);
+ if (ret < 0) {
+ fprintf(stderr, "Error encoding frame\n");
+ exit(1);
+ }
+
+ if (got_output) {
+ printf("Write frame %3d (size=%5d)\n", i, pkt.size);
+ fwrite(pkt.data, 1, pkt.size, f);
+ av_free_packet(&pkt);
+ }
+ }
+
+ /* add sequence end code to have a real mpeg file */
+ fwrite(endcode, 1, sizeof(endcode), f);
+ fclose(f);
+
+ avcodec_close(c);
+ av_free(c);
+ av_freep(&frame->data[0]);
+ avcodec_free_frame(&frame);
+ printf("\n");
+}
+
+/*
+ * Video decoding example
+ */
+
+static void avCodec::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;i<ysize;i++)
+ fwrite(buf + i * wrap,1,xsize,f);
+ fclose(f);
+}
+
+static int avCodec::decode_write_frame(const char *outfilename, AVCodecContext *avctx,
+ AVFrame *frame, int *frame_count, AVPacket *pkt, int last)
+{
+ int len, got_frame;
+ char buf[1024];
+
+ len = avcodec_decode_video2(avctx, frame, &got_frame, pkt);
+ if (len < 0) {
+ fprintf(stderr, "Error while decoding frame %d\n", *frame_count);
+ return len;
+ }
+ if (got_frame) {
+ printf("Saving %sframe %3d\n", last ? "last " : "", *frame_count);
+ fflush(stdout);
+
+ /* the picture is allocated by the decoder, no need to free it */
+ snprintf(buf, sizeof(buf), outfilename, *frame_count);
+ pgm_save(frame->data[0], frame->linesize[0],
+ avctx->width, avctx->height, buf);
+ (*frame_count)++;
+ }
+ if (pkt->data) {
+ pkt->size -= len;
+ pkt->data += len;
+ }
+ return 0;
+}
+
+static void avCodec::video_decode_example(const char *outfilename, const char *filename)
+{
+ AVCodec *codec;
+ AVCodecContext *c= NULL;
+ int frame_count;
+ FILE *f;
+ AVFrame *frame;
+ uint8_t inbuf[INBUF_SIZE + FF_INPUT_BUFFER_PADDING_SIZE];
+ AVPacket avpkt;
+
+ av_init_packet(&avpkt);
+
+ /* set end of buffer to 0 (this ensures that no overreading happens for damaged mpeg streams) */
+ memset(inbuf + INBUF_SIZE, 0, FF_INPUT_BUFFER_PADDING_SIZE);
+
+ printf("Decode video file %s to %s\n", filename, outfilename);
+
+ /* find the mpeg1 video decoder */
+ codec = avcodec_find_decoder(AV_CODEC_ID_MPEG1VIDEO);
+ if (!codec) {
+ fprintf(stderr, "Codec not found\n");
+ exit(1);
+ }
+
+ c = avcodec_alloc_context3(codec);
+ if (!c) {
+ fprintf(stderr, "Could not allocate video codec context\n");
+ exit(1);
+ }
+
+ if(codec->capabilities&CODEC_CAP_TRUNCATED)
+ c->flags|= CODEC_FLAG_TRUNCATED; /* we do not send complete frames */
+
+ /* For some codecs, such as msmpeg4 and mpeg4, width and height
+ MUST be initialized there because this information is not
+ available in the bitstream. */
+
+ /* open it */
+ if (avcodec_open2(c, codec, NULL) < 0) {
+ fprintf(stderr, "Could not open codec\n");
+ exit(1);
+ }
+
+ f = fopen(filename, "rb");
+ if (!f) {
+ fprintf(stderr, "Could not open %s\n", filename);
+ exit(1);
+ }
+
+ frame = avcodec_alloc_frame();
+ if (!frame) {
+ fprintf(stderr, "Could not allocate video frame\n");
+ exit(1);
+ }
+
+ frame_count = 0;
+ for(;;) {
+ avpkt.size = fread(inbuf, 1, INBUF_SIZE, f);
+ if (avpkt.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 */
+ avpkt.data = inbuf;
+ while (avpkt.size > 0)
+ if (decode_write_frame(outfilename, c, frame, &frame_count, &avpkt, 0) < 0)
+ exit(1);
+ }
+
+ /* 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 */
+ avpkt.data = NULL;
+ avpkt.size = 0;
+ decode_write_frame(outfilename, c, frame, &frame_count, &avpkt, 1);
+
+ fclose(f);
+
+ avcodec_close(c);
+ av_free(c);
+ avcodec_free_frame(&frame);
+ printf("\n");
+} \ No newline at end of file
diff --git a/rotord/av/avCodec.d b/rotord/av/avCodec.d
new file mode 100644
index 0000000..4bc3a37
--- /dev/null
+++ b/rotord/av/avCodec.d
@@ -0,0 +1,66 @@
+./avCodec.o: avCodec.cpp avCodec.h /usr/include/math.h \
+ /usr/include/features.h /usr/include/i386-linux-gnu/bits/predefs.h \
+ /usr/include/i386-linux-gnu/sys/cdefs.h \
+ /usr/include/i386-linux-gnu/bits/wordsize.h \
+ /usr/include/i386-linux-gnu/gnu/stubs.h \
+ /usr/include/i386-linux-gnu/gnu/stubs-32.h \
+ /usr/include/i386-linux-gnu/bits/huge_val.h \
+ /usr/include/i386-linux-gnu/bits/huge_valf.h \
+ /usr/include/i386-linux-gnu/bits/huge_vall.h \
+ /usr/include/i386-linux-gnu/bits/inf.h \
+ /usr/include/i386-linux-gnu/bits/nan.h \
+ /usr/include/i386-linux-gnu/bits/mathdef.h \
+ /usr/include/i386-linux-gnu/bits/mathcalls.h \
+ /usr/include/i386-linux-gnu/bits/mathinline.h \
+ ../ffmpeg/libavcodec/avcodec.h /usr/include/errno.h \
+ /usr/include/i386-linux-gnu/bits/errno.h /usr/include/linux/errno.h \
+ /usr/include/i386-linux-gnu/asm/errno.h /usr/include/asm-generic/errno.h \
+ /usr/include/asm-generic/errno-base.h ../ffmpeg/libavutil/samplefmt.h \
+ /usr/lib/gcc/i686-linux-gnu/4.7/include/stdint.h /usr/include/stdint.h \
+ /usr/include/i386-linux-gnu/bits/wchar.h ../ffmpeg/libavutil/avutil.h \
+ ../ffmpeg/libavutil/common.h /usr/include/ctype.h \
+ /usr/include/i386-linux-gnu/bits/types.h \
+ /usr/include/i386-linux-gnu/bits/typesizes.h /usr/include/endian.h \
+ /usr/include/i386-linux-gnu/bits/endian.h \
+ /usr/include/i386-linux-gnu/bits/byteswap.h /usr/include/xlocale.h \
+ /usr/include/inttypes.h \
+ /usr/lib/gcc/i686-linux-gnu/4.7/include-fixed/limits.h \
+ /usr/lib/gcc/i686-linux-gnu/4.7/include-fixed/syslimits.h \
+ /usr/include/limits.h /usr/include/i386-linux-gnu/bits/posix1_lim.h \
+ /usr/include/i386-linux-gnu/bits/local_lim.h /usr/include/linux/limits.h \
+ /usr/include/i386-linux-gnu/bits/posix2_lim.h \
+ /usr/include/i386-linux-gnu/bits/xopen_lim.h \
+ /usr/include/i386-linux-gnu/bits/stdio_lim.h /usr/include/stdio.h \
+ /usr/lib/gcc/i686-linux-gnu/4.7/include/stddef.h /usr/include/libio.h \
+ /usr/include/_G_config.h /usr/include/wchar.h \
+ /usr/lib/gcc/i686-linux-gnu/4.7/include/stdarg.h \
+ /usr/include/i386-linux-gnu/bits/sys_errlist.h \
+ /usr/include/i386-linux-gnu/bits/stdio.h \
+ /usr/include/i386-linux-gnu/bits/stdio2.h /usr/include/stdlib.h \
+ /usr/include/i386-linux-gnu/bits/waitflags.h \
+ /usr/include/i386-linux-gnu/bits/waitstatus.h \
+ /usr/include/i386-linux-gnu/sys/types.h /usr/include/time.h \
+ /usr/include/i386-linux-gnu/sys/select.h \
+ /usr/include/i386-linux-gnu/bits/select.h \
+ /usr/include/i386-linux-gnu/bits/sigset.h \
+ /usr/include/i386-linux-gnu/bits/time.h \
+ /usr/include/i386-linux-gnu/bits/select2.h \
+ /usr/include/i386-linux-gnu/sys/sysmacros.h \
+ /usr/include/i386-linux-gnu/bits/pthreadtypes.h /usr/include/alloca.h \
+ /usr/include/i386-linux-gnu/bits/stdlib.h /usr/include/string.h \
+ /usr/include/i386-linux-gnu/bits/string3.h \
+ ../ffmpeg/libavutil/attributes.h ../ffmpeg/libavutil/version.h \
+ /usr/include/libavutil/avconfig.h ../ffmpeg/libavutil/mem.h \
+ ../ffmpeg/libavutil/error.h ../ffmpeg/libavutil/mathematics.h \
+ ../ffmpeg/libavutil/rational.h ../ffmpeg/libavutil/intfloat.h \
+ ../ffmpeg/libavutil/intfloat_readwrite.h ../ffmpeg/libavutil/log.h \
+ ../ffmpeg/libavutil/pixfmt.h ../ffmpeg/libavutil/version.h \
+ ../ffmpeg/libavutil/old_pix_fmts.h ../ffmpeg/libavutil/avutil.h \
+ ../ffmpeg/libavutil/cpu.h ../ffmpeg/libavutil/channel_layout.h \
+ ../ffmpeg/libavutil/dict.h ../ffmpeg/libavutil/log.h \
+ ../ffmpeg/libavutil/pixfmt.h ../ffmpeg/libavutil/rational.h \
+ ../ffmpeg/libavcodec/version.h ../ffmpeg/libavcodec/old_codec_ids.h \
+ ../ffmpeg/libavutil/common.h ../ffmpeg/libavutil/opt.h \
+ ../ffmpeg/libavutil/dict.h ../ffmpeg/libavutil/samplefmt.h \
+ ../ffmpeg/libavutil/imgutils.h ../ffmpeg/libavutil/pixdesc.h \
+ ../ffmpeg/libavutil/mathematics.h
diff --git a/rotord/av/avCodec.h b/rotord/av/avCodec.h
new file mode 100644
index 0000000..7e1815a
--- /dev/null
+++ b/rotord/av/avCodec.h
@@ -0,0 +1,35 @@
+// libav includes
+// from /usr/include
+
+extern "C" {
+ #ifndef __STDC_CONSTANT_MACROS
+ # define __STDC_CONSTANT_MACROS
+ #endif
+
+ #ifndef UINT64_C
+ #define UINT64_C(c) (c ## ULL)
+ #endif
+
+ #include <math.h>
+
+ #include "libavcodec/avcodec.h"
+
+ #include "libavutil/opt.h"
+ #include "libavutil/channel_layout.h"
+ #include "libavutil/common.h"
+ #include "libavutil/imgutils.h"
+ #include "libavutil/mathematics.h"
+ #include "libavutil/samplefmt.h"
+}
+
+namespace avCodec {
+ static int check_sample_fmt(AVCodec *codec, enum AVSampleFormat sample_fmt);
+ static int select_sample_rate(AVCodec *codec);
+ static int select_channel_layout(AVCodec *codec);
+ static void audio_encode_example(const char *filename);
+ static void audio_decode_example(const char *outfilename, const char *filename);
+ static void video_encode_example(const char *filename, int codec_id);
+ static void pgm_save(unsigned char *buf, int wrap, int xsize, int ysize,char *filename);
+ static int decode_write_frame(const char *outfilename, AVCodecContext *avctx,AVFrame *frame, int *frame_count, AVPacket *pkt, int last);
+ static void video_decode_example(const char *outfilename, const char *filename);
+} \ No newline at end of file
diff --git a/rotord/av/avCodec.o b/rotord/av/avCodec.o
new file mode 100644
index 0000000..e270b4b
--- /dev/null
+++ b/rotord/av/avCodec.o
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generated by cgit v1.2.3 (git 2.39.1) at 2025-12-06 16:51:12 +0000