fftools/ffmpeg: add loopback decoding

This allows to send an encoder's output back to decoding and feed the
result into a complex filtergraph.

1 files changed, 26 insertions, 0 deletions

diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c
index ffd25f4c5b..d4e5f978f1 100644
--- a/fftools/ffmpeg.c
+++ b/fftools/ffmpeg.c
@@ -131,6 +131,9 @@ int         nb_output_files   = 0;
 FilterGraph **filtergraphs;
 int        nb_filtergraphs;
 
+Decoder     **decoders;
+int        nb_decoders;
+
 #if HAVE_TERMIOS_H
 
 /* init terminal so that we can grab keys */
@@ -340,6 +343,10 @@ static void ffmpeg_cleanup(int ret)
     for (int i = 0; i < nb_input_files; i++)
         ifile_close(&input_files[i]);
 
+    for (int i = 0; i < nb_decoders; i++)
+        dec_free(&decoders[i]);
+    av_freep(&decoders);
+
     if (vstats_file) {
         if (fclose(vstats_file))
             av_log(NULL, AV_LOG_ERROR,
@@ -404,6 +411,10 @@ InputStream *ist_iter(InputStream *prev)
 
 static void frame_data_free(void *opaque, uint8_t *data)
 {
+    FrameData *fd = (FrameData *)data;
+
+    avcodec_parameters_free(&fd->par_enc);
+
     av_free(data);
 }
 
@@ -430,6 +441,21 @@ static int frame_data_ensure(AVBufferRef **dst, int writable)
             const FrameData *fd_src = (const FrameData *)src->data;
 
             memcpy(fd, fd_src, sizeof(*fd));
+            fd->par_enc = NULL;
+
+            if (fd_src->par_enc) {
+                int ret = 0;
+
+                fd->par_enc = avcodec_parameters_alloc();
+                ret = fd->par_enc ?
+                      avcodec_parameters_copy(fd->par_enc, fd_src->par_enc) :
+                      AVERROR(ENOMEM);
+                if (ret < 0) {
+                    av_buffer_unref(dst);
+                    av_buffer_unref(&src);
+                    return ret;
+                }
+            }
 
             av_buffer_unref(&src);
         } else {