moved packet output to a separate function - added the frame buffered by the decoder...
[ffmpeg.git] / ffmpeg.c
index 990ce0e..a3f4bbd 100644 (file)
--- a/ffmpeg.c
+++ b/ffmpeg.c
@@ -791,6 +791,197 @@ static void print_report(AVFormatContext **output_files,
         fprintf(stderr, "\n");
 }
 
+/* pkt = NULL means EOF (needed to flush decoder buffers) */
+static int output_packet(AVInputStream *ist, int ist_index,
+                         AVOutputStream **ost_table, int nb_ostreams,
+                         AVPacket *pkt)
+{
+    AVFormatContext *os;
+    AVOutputStream *ost;
+    uint8_t *ptr;
+    int len, ret, i;
+    uint8_t *data_buf;
+    int data_size, got_picture;
+    AVFrame picture;
+    short samples[AVCODEC_MAX_AUDIO_FRAME_SIZE / 2];
+    void *buffer_to_free;
+        
+    if (pkt && pkt->pts != AV_NOPTS_VALUE) {
+        ist->pts = pkt->pts;
+    } else {
+        ist->pts = ist->next_pts;
+    }
+    
+    if (pkt == NULL) {
+        /* EOF handling */
+        ptr = NULL;
+        len = 0;
+        goto handle_eof;
+    }
+
+    len = pkt->size;
+    ptr = pkt->data;
+    while (len > 0) {
+    handle_eof:
+        /* decode the packet if needed */
+        data_buf = NULL; /* fail safe */
+        data_size = 0;
+        if (ist->decoding_needed) {
+            switch(ist->st->codec.codec_type) {
+            case CODEC_TYPE_AUDIO:
+                    /* XXX: could avoid copy if PCM 16 bits with same
+                       endianness as CPU */
+                ret = avcodec_decode_audio(&ist->st->codec, samples, &data_size,
+                                           ptr, len);
+                if (ret < 0)
+                    goto fail_decode;
+                ptr += ret;
+                len -= ret;
+                /* Some bug in mpeg audio decoder gives */
+                /* data_size < 0, it seems they are overflows */
+                if (data_size <= 0) {
+                    /* no audio frame */
+                    continue;
+                }
+                data_buf = (uint8_t *)samples;
+                ist->next_pts += ((int64_t)AV_TIME_BASE * data_size) / 
+                    (2 * ist->st->codec.channels);
+                break;
+            case CODEC_TYPE_VIDEO:
+                    data_size = (ist->st->codec.width * ist->st->codec.height * 3) / 2;
+                    /* XXX: allocate picture correctly */
+                    memset(&picture, 0, sizeof(picture));
+                    ret = avcodec_decode_video(&ist->st->codec, 
+                                               &picture, &got_picture, ptr, len);
+                    ist->st->quality= picture.quality;
+                    if (ret < 0) 
+                        goto fail_decode;
+                    if (!got_picture) {
+                        /* no picture yet */
+                        goto discard_packet;
+                    }
+                    if (ist->st->codec.frame_rate_base != 0) {
+                        ist->next_pts += ((int64_t)AV_TIME_BASE * 
+                                          ist->st->codec.frame_rate_base) /
+                            ist->st->codec.frame_rate;
+                    }
+                    len = 0;
+                    break;
+                default:
+                    goto fail_decode;
+                }
+            } else {
+                data_buf = ptr;
+                data_size = len;
+                ret = len;
+                len = 0;
+            }
+
+            buffer_to_free = NULL;
+            if (ist->st->codec.codec_type == CODEC_TYPE_VIDEO) {
+                pre_process_video_frame(ist, (AVPicture *)&picture, 
+                                        &buffer_to_free);
+            }
+
+            /* frame rate emulation */
+            if (ist->st->codec.rate_emu) {
+                int64_t pts = av_rescale((int64_t) ist->frame * ist->st->codec.frame_rate_base, 1000000, ist->st->codec.frame_rate);
+                int64_t now = av_gettime() - ist->start;
+                if (pts > now)
+                    usleep(pts - now);
+
+                ist->frame++;
+            }
+
+#if 0
+            /* mpeg PTS deordering : if it is a P or I frame, the PTS
+               is the one of the next displayed one */
+            /* XXX: add mpeg4 too ? */
+            if (ist->st->codec.codec_id == CODEC_ID_MPEG1VIDEO) {
+                if (ist->st->codec.pict_type != B_TYPE) {
+                    int64_t tmp;
+                    tmp = ist->last_ip_pts;
+                    ist->last_ip_pts  = ist->frac_pts.val;
+                    ist->frac_pts.val = tmp;
+                }
+            }
+#endif
+            /* if output time reached then transcode raw format, 
+              encode packets and output them */
+            if (start_time == 0 || ist->pts >= start_time)
+                for(i=0;i<nb_ostreams;i++) {
+                    int frame_size;
+
+                    ost = ost_table[i];
+                    if (ost->source_index == ist_index) {
+                        os = output_files[ost->file_index];
+
+#if 0
+                        printf("%d: got pts=%0.3f %0.3f\n", i, 
+                               (double)pkt->pts / AV_TIME_BASE, 
+                               ((double)ist->pts / AV_TIME_BASE) - 
+                               ((double)ost->st->pts.val * os->pts_num / os->pts_den));
+#endif
+                        /* set the input output pts pairs */
+                        ost->sync_ipts = (double)ist->pts / AV_TIME_BASE;
+                        /* XXX: take into account the various fifos,
+                           in particular for audio */
+                        ost->sync_opts = ost->st->pts.val;
+                        //printf("ipts=%lld sync_ipts=%f sync_opts=%lld pts.val=%lld pkt->pts=%lld\n", ist->pts, ost->sync_ipts, ost->sync_opts, ost->st->pts.val, pkt->pts); 
+
+                        if (ost->encoding_needed) {
+                            switch(ost->st->codec.codec_type) {
+                            case CODEC_TYPE_AUDIO:
+                                do_audio_out(os, ost, ist, data_buf, data_size);
+                                break;
+                            case CODEC_TYPE_VIDEO:
+                                /* find an audio stream for synchro */
+                                {
+                                    int i;
+                                    AVOutputStream *audio_sync, *ost1;
+                                    audio_sync = NULL;
+                                    for(i=0;i<nb_ostreams;i++) {
+                                        ost1 = ost_table[i];
+                                        if (ost1->file_index == ost->file_index &&
+                                            ost1->st->codec.codec_type == CODEC_TYPE_AUDIO) {
+                                            audio_sync = ost1;
+                                            break;
+                                        }
+                                    }
+
+                                    do_video_out(os, ost, ist, &picture, &frame_size, audio_sync);
+                                    if (do_vstats && frame_size)
+                                        do_video_stats(os, ost, frame_size);
+                                }
+                                break;
+                            default:
+                                av_abort();
+                            }
+                        } else {
+                            AVFrame avframe;
+                                                
+                            /* no reencoding needed : output the packet directly */
+                            /* force the input stream PTS */
+                        
+                            memset(&avframe, 0, sizeof(AVFrame));
+                            ost->st->codec.coded_frame= &avframe;
+                            avframe.key_frame = pkt->flags & PKT_FLAG_KEY; 
+                        
+                            av_write_frame(os, ost->index, data_buf, data_size);
+                            ost->st->codec.frame_number++;
+                            ost->frame_number++;
+                        }
+                    }
+                }
+            av_free(buffer_to_free);
+        }
+ discard_packet:
+    return 0;
+ fail_decode:
+    return -1;
+}
+
+
 /*
  * The following code is the main loop of the file converter
  */
@@ -1191,13 +1382,6 @@ static int av_encode(AVFormatContext **output_files,
     for(; received_sigterm == 0;) {
         int file_index, ist_index;
         AVPacket pkt;
-        uint8_t *ptr;
-        int len;
-        uint8_t *data_buf;
-        int data_size, got_picture;
-        AVFrame picture;
-        short samples[AVCODEC_MAX_AUDIO_FRAME_SIZE / 2];
-        void *buffer_to_free;
         double pts_min;
         
     redo:
@@ -1258,179 +1442,28 @@ static int av_encode(AVFormatContext **output_files,
             goto discard_packet;
 
         //fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->index, pkt.size);
-        
-        if (pkt.pts != AV_NOPTS_VALUE) {
-            ist->pts = pkt.pts;
-        } else {
-            ist->pts = ist->next_pts;
-        }
-
-        len = pkt.size;
-        ptr = pkt.data;
-        while (len > 0) {
-            /* decode the packet if needed */
-            data_buf = NULL; /* fail safe */
-            data_size = 0;
-            if (ist->decoding_needed) {
-                switch(ist->st->codec.codec_type) {
-                case CODEC_TYPE_AUDIO:
-                    /* XXX: could avoid copy if PCM 16 bits with same
-                       endianness as CPU */
-                    ret = avcodec_decode_audio(&ist->st->codec, samples, &data_size,
-                                               ptr, len);
-                    if (ret < 0)
-                        goto fail_decode;
-                    ptr += ret;
-                    len -= ret;
-                    /* Some bug in mpeg audio decoder gives */
-                    /* data_size < 0, it seems they are overflows */
-                    if (data_size <= 0) {
-                        /* no audio frame */
-                        continue;
-                    }
-                    data_buf = (uint8_t *)samples;
-                    ist->next_pts += ((int64_t)AV_TIME_BASE * data_size) / 
-                        (2 * ist->st->codec.channels);
-                    break;
-                case CODEC_TYPE_VIDEO:
-                    data_size = (ist->st->codec.width * ist->st->codec.height * 3) / 2;
-                    /* XXX: allocate picture correctly */
-                    memset(&picture, 0, sizeof(picture));
-                    ret = avcodec_decode_video(&ist->st->codec, 
-                                               &picture, &got_picture, ptr, len);
-                    ist->st->quality= picture.quality;
-                    if (ret < 0) {
-                    fail_decode:
-                        fprintf(stderr, "Error while decoding stream #%d.%d\n",
-                                ist->file_index, ist->index);
-                        av_free_packet(&pkt);
-                        goto redo;
-                    }
-                    if (!got_picture) {
-                        /* no picture yet */
-                        goto discard_packet;
-                    }
-                    if (ist->st->codec.frame_rate_base != 0) {
-                        ist->next_pts += ((int64_t)AV_TIME_BASE * 
-                                          ist->st->codec.frame_rate_base) /
-                            ist->st->codec.frame_rate;
-                    }
-                    len = 0;
-                    break;
-                default:
-                    goto fail_decode;
-                }
-            } else {
-                data_buf = ptr;
-                data_size = len;
-                ret = len;
-                len = 0;
-            }
-
-            buffer_to_free = NULL;
-            if (ist->st->codec.codec_type == CODEC_TYPE_VIDEO) {
-                pre_process_video_frame(ist, (AVPicture *)&picture, 
-                                        &buffer_to_free);
-            }
-
-            /* frame rate emulation */
-            if (ist->st->codec.rate_emu) {
-                int64_t pts = av_rescale((int64_t) ist->frame * ist->st->codec.frame_rate_base, 1000000, ist->st->codec.frame_rate);
-                int64_t now = av_gettime() - ist->start;
-                if (pts > now)
-                    usleep(pts - now);
-
-                ist->frame++;
-            }
-
-#if 0
-            /* mpeg PTS deordering : if it is a P or I frame, the PTS
-               is the one of the next displayed one */
-            /* XXX: add mpeg4 too ? */
-            if (ist->st->codec.codec_id == CODEC_ID_MPEG1VIDEO) {
-                if (ist->st->codec.pict_type != B_TYPE) {
-                    int64_t tmp;
-                    tmp = ist->last_ip_pts;
-                    ist->last_ip_pts  = ist->frac_pts.val;
-                    ist->frac_pts.val = tmp;
-                }
-            }
-#endif
-            /* if output time reached then transcode raw format, 
-              encode packets and output them */
-            if (start_time == 0 || ist->pts >= start_time)
-                for(i=0;i<nb_ostreams;i++) {
-                    int frame_size;
-
-                    ost = ost_table[i];
-                    if (ost->source_index == ist_index) {
-                        os = output_files[ost->file_index];
-
-#if 0
-                        printf("%d: got pts=%0.3f %0.3f\n", i, 
-                               (double)pkt.pts / AV_TIME_BASE, 
-                               ((double)ist->pts / AV_TIME_BASE) - 
-                               ((double)ost->st->pts.val * os->pts_num / os->pts_den));
-#endif
-                        /* set the input output pts pairs */
-                        ost->sync_ipts = (double)ist->pts / AV_TIME_BASE;
-                        /* XXX: take into account the various fifos,
-                           in particular for audio */
-                        ost->sync_opts = ost->st->pts.val;
-                        //printf("ipts=%lld sync_ipts=%f sync_opts=%lld pts.val=%lld pkt.pts=%lld\n", ist->pts, ost->sync_ipts, ost->sync_opts, ost->st->pts.val, pkt.pts); 
-
-                        if (ost->encoding_needed) {
-                            switch(ost->st->codec.codec_type) {
-                            case CODEC_TYPE_AUDIO:
-                                do_audio_out(os, ost, ist, data_buf, data_size);
-                                break;
-                            case CODEC_TYPE_VIDEO:
-                                /* find an audio stream for synchro */
-                                {
-                                    int i;
-                                    AVOutputStream *audio_sync, *ost1;
-                                    audio_sync = NULL;
-                                    for(i=0;i<nb_ostreams;i++) {
-                                        ost1 = ost_table[i];
-                                        if (ost1->file_index == ost->file_index &&
-                                            ost1->st->codec.codec_type == CODEC_TYPE_AUDIO) {
-                                            audio_sync = ost1;
-                                            break;
-                                        }
-                                    }
-
-                                    do_video_out(os, ost, ist, &picture, &frame_size, audio_sync);
-                                    if (do_vstats && frame_size)
-                                        do_video_stats(os, ost, frame_size);
-                                }
-                                break;
-                            default:
-                                av_abort();
-                            }
-                        } else {
-                            AVFrame avframe;
-                                                
-                            /* no reencoding needed : output the packet directly */
-                            /* force the input stream PTS */
-                        
-                            memset(&avframe, 0, sizeof(AVFrame));
-                            ost->st->codec.coded_frame= &avframe;
-                            avframe.key_frame = pkt.flags & PKT_FLAG_KEY; 
-                        
-                            av_write_frame(os, ost->index, data_buf, data_size);
-                            ost->st->codec.frame_number++;
-                            ost->frame_number++;
-                        }
-                    }
-                }
-            av_free(buffer_to_free);
+        if (output_packet(ist, ist_index, ost_table, nb_ostreams, &pkt) < 0) {
+            fprintf(stderr, "Error while decoding stream #%d.%d\n",
+                    ist->file_index, ist->index);
+            av_free_packet(&pkt);
+            goto redo;
         }
+        
     discard_packet:
         av_free_packet(&pkt);
         
         /* dump report by using the output first video and audio streams */
         print_report(output_files, ost_table, nb_ostreams, 0);
     }
+
+    /* at the end of stream, we must flush the decoder buffers */
+    for(i=0;i<nb_istreams;i++) {
+        ist = ist_table[i];
+        if (ist->decoding_needed) {
+            output_packet(ist, i, ost_table, nb_ostreams, NULL);
+        }
+    }
+
     term_exit();
 
     /* dump report by using the first video and audio streams */