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Diffstat (limited to 'contrib/ffmpeg/libavformat/flvenc.c')
-rw-r--r--contrib/ffmpeg/libavformat/flvenc.c284
1 files changed, 284 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavformat/flvenc.c b/contrib/ffmpeg/libavformat/flvenc.c
new file mode 100644
index 000000000..0b09d9830
--- /dev/null
+++ b/contrib/ffmpeg/libavformat/flvenc.c
@@ -0,0 +1,284 @@
+/*
+ * FLV muxer
+ * Copyright (c) 2003 The FFmpeg Project.
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+#include "avformat.h"
+
+#undef NDEBUG
+#include <assert.h>
+
+typedef struct FLVContext {
+ int hasAudio;
+ int hasVideo;
+ int reserved;
+ offset_t duration_offset;
+ offset_t filesize_offset;
+ int64_t duration;
+} FLVContext;
+
+static int get_audio_flags(AVCodecContext *enc){
+ int flags = (enc->bits_per_sample == 16) ? 0x2 : 0x0;
+
+ switch (enc->sample_rate) {
+ case 44100:
+ flags |= 0x0C;
+ break;
+ case 22050:
+ flags |= 0x08;
+ break;
+ case 11025:
+ flags |= 0x04;
+ break;
+ case 8000: //nellymoser only
+ case 5512: //not mp3
+ flags |= 0x00;
+ break;
+ default:
+ av_log(enc, AV_LOG_ERROR, "flv doesnt support that sample rate, choose from (44100, 22050, 11025)\n");
+ return -1;
+ }
+
+ if (enc->channels > 1) {
+ flags |= 0x01;
+ }
+
+ switch(enc->codec_id){
+ case CODEC_ID_MP3:
+ flags |= 0x20 | 0x2;
+ break;
+ case CODEC_ID_PCM_S8:
+ break;
+ case CODEC_ID_PCM_S16BE:
+ flags |= 0x2;
+ break;
+ case CODEC_ID_PCM_S16LE:
+ flags |= 0x30 | 0x2;
+ break;
+ case CODEC_ID_ADPCM_SWF:
+ flags |= 0x10;
+ break;
+ case 0:
+ flags |= enc->codec_tag<<4;
+ break;
+ default:
+ av_log(enc, AV_LOG_ERROR, "codec not compatible with flv\n");
+ return -1;
+ }
+
+ return flags;
+}
+
+#define AMF_DOUBLE 0
+#define AMF_BOOLEAN 1
+#define AMF_STRING 2
+#define AMF_OBJECT 3
+#define AMF_MIXED_ARRAY 8
+#define AMF_ARRAY 10
+#define AMF_DATE 11
+
+static void put_amf_string(ByteIOContext *pb, const char *str)
+{
+ size_t len = strlen(str);
+ put_be16(pb, len);
+ put_buffer(pb, str, len);
+}
+
+static void put_amf_double(ByteIOContext *pb, double d)
+{
+ put_byte(pb, AMF_DOUBLE);
+ put_be64(pb, av_dbl2int(d));
+}
+
+static int flv_write_header(AVFormatContext *s)
+{
+ ByteIOContext *pb = &s->pb;
+ FLVContext *flv = s->priv_data;
+ int i, width, height, samplerate;
+ double framerate = 0.0;
+ int metadata_size_pos, data_size;
+
+ flv->hasAudio = 0;
+ flv->hasVideo = 0;
+
+ put_tag(pb,"FLV");
+ put_byte(pb,1);
+ put_byte(pb,0); // delayed write
+ put_be32(pb,9);
+ put_be32(pb,0);
+
+ for(i=0; i<s->nb_streams; i++){
+ AVCodecContext *enc = s->streams[i]->codec;
+ if (enc->codec_type == CODEC_TYPE_VIDEO) {
+ width = enc->width;
+ height = enc->height;
+ if (s->streams[i]->r_frame_rate.den && s->streams[i]->r_frame_rate.num) {
+ framerate = av_q2d(s->streams[i]->r_frame_rate);
+ } else {
+ framerate = 1/av_q2d(s->streams[i]->codec->time_base);
+ }
+ flv->hasVideo=1;
+ } else {
+ flv->hasAudio=1;
+ samplerate = enc->sample_rate;
+ }
+ av_set_pts_info(s->streams[i], 24, 1, 1000); /* 24 bit pts in ms */
+ if(enc->codec_tag == 5){
+ put_byte(pb,8); // message type
+ put_be24(pb,0); // include flags
+ put_be24(pb,0); // time stamp
+ put_be32(pb,0); // reserved
+ put_be32(pb,11); // size
+ flv->reserved=5;
+ }
+ if(enc->codec_type == CODEC_TYPE_AUDIO && get_audio_flags(enc)<0)
+ return -1;
+ }
+
+ /* write meta_tag */
+ put_byte(pb, 18); // tag type META
+ metadata_size_pos= url_ftell(pb);
+ put_be24(pb, 0); // size of data part (sum of all parts below)
+ put_be24(pb, 0); // time stamp
+ put_be32(pb, 0); // reserved
+
+ /* now data of data_size size */
+
+ /* first event name as a string */
+ put_byte(pb, AMF_STRING); // 1 byte
+ put_amf_string(pb, "onMetaData"); // 12 bytes
+
+ /* mixed array (hash) with size and string/type/data tuples */
+ put_byte(pb, AMF_MIXED_ARRAY);
+ put_be32(pb, 4*flv->hasVideo + flv->hasAudio + 2); // +2 for duration and file size
+
+ put_amf_string(pb, "duration");
+ flv->duration_offset= url_ftell(pb);
+ put_amf_double(pb, 0); // delayed write
+
+ if(flv->hasVideo){
+ put_amf_string(pb, "width");
+ put_amf_double(pb, width);
+
+ put_amf_string(pb, "height");
+ put_amf_double(pb, height);
+
+ put_amf_string(pb, "videodatarate");
+ put_amf_double(pb, s->bit_rate / 1024.0);
+
+ put_amf_string(pb, "framerate");
+ put_amf_double(pb, framerate);
+ }
+
+ if(flv->hasAudio){
+ put_amf_string(pb, "audiosamplerate");
+ put_amf_double(pb, samplerate);
+ }
+
+ put_amf_string(pb, "filesize");
+ flv->filesize_offset= url_ftell(pb);
+ put_amf_double(pb, 0); // delayed write
+
+ put_amf_string(pb, "");
+ put_byte(pb, 9); // end marker 1 byte
+
+ /* write total size of tag */
+ data_size= url_ftell(pb) - metadata_size_pos - 10;
+ url_fseek(pb, metadata_size_pos, SEEK_SET);
+ put_be24(pb, data_size);
+ url_fseek(pb, data_size + 10 - 3, SEEK_CUR);
+ put_be32(pb, data_size + 11);
+
+ return 0;
+}
+
+static int flv_write_trailer(AVFormatContext *s)
+{
+ int64_t file_size;
+ int flags = 0;
+
+ ByteIOContext *pb = &s->pb;
+ FLVContext *flv = s->priv_data;
+
+ file_size = url_ftell(pb);
+ flags |= flv->hasAudio ? 4 : 0;
+ flags |= flv->hasVideo ? 1 : 0;
+ url_fseek(pb, 4, SEEK_SET);
+ put_byte(pb,flags);
+
+ /* update informations */
+ url_fseek(pb, flv->duration_offset, SEEK_SET);
+ put_amf_double(pb, flv->duration / (double)1000);
+ url_fseek(pb, flv->filesize_offset, SEEK_SET);
+ put_amf_double(pb, file_size);
+
+ url_fseek(pb, file_size, SEEK_SET);
+ return 0;
+}
+
+static int flv_write_packet(AVFormatContext *s, AVPacket *pkt)
+{
+ ByteIOContext *pb = &s->pb;
+ AVCodecContext *enc = s->streams[pkt->stream_index]->codec;
+ FLVContext *flv = s->priv_data;
+ int size= pkt->size;
+ int flags;
+
+// av_log(s, AV_LOG_DEBUG, "type:%d pts: %"PRId64" size:%d\n", enc->codec_type, timestamp, size);
+
+ if (enc->codec_type == CODEC_TYPE_VIDEO) {
+ put_byte(pb, 9);
+ flags = 2; // choose h263
+ flags |= pkt->flags & PKT_FLAG_KEY ? 0x10 : 0x20; // add keyframe indicator
+ } else {
+ assert(enc->codec_type == CODEC_TYPE_AUDIO);
+ flags = get_audio_flags(enc);
+
+ assert(size);
+
+ put_byte(pb, 8);
+ }
+
+ put_be24(pb,size+1); // include flags
+ put_be24(pb,pkt->pts);
+ put_be32(pb,flv->reserved);
+ put_byte(pb,flags);
+ put_buffer(pb, pkt->data, size);
+ put_be32(pb,size+1+11); // previous tag size
+ flv->duration = pkt->pts + pkt->duration;
+
+ put_flush_packet(pb);
+ return 0;
+}
+
+AVOutputFormat flv_muxer = {
+ "flv",
+ "flv format",
+ "video/x-flv",
+ "flv",
+ sizeof(FLVContext),
+#ifdef CONFIG_MP3LAME
+ CODEC_ID_MP3,
+#else // CONFIG_MP3LAME
+ CODEC_ID_NONE,
+#endif // CONFIG_MP3LAME
+ CODEC_ID_FLV1,
+ flv_write_header,
+ flv_write_packet,
+ flv_write_trailer,
+};
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