#include "libavutil/intfloat.h"
#include "libavutil/avassert.h"
#include "libavutil/mathematics.h"
+#include "avio_internal.h"
+#include "avio.h"
#include "avc.h"
#include "avformat.h"
#include "flv.h"
typedef enum {
FLV_AAC_SEQ_HEADER_DETECT = (1 << 0),
FLV_NO_SEQUENCE_END = (1 << 1),
+ FLV_ADD_KEYFRAME_INDEX = (1 << 2),
+ FLV_NO_METADATA = (1 << 3),
+ FLV_NO_DURATION_FILESIZE = (1 << 4),
} FLVFlags;
+typedef struct FLVFileposition {
+ int64_t keyframe_position;
+ double keyframe_timestamp;
+ struct FLVFileposition *next;
+} FLVFileposition;
+
typedef struct FLVContext {
AVClass *av_class;
int reserved;
int64_t duration;
int64_t delay; ///< first dts delay (needed for AVC & Speex)
+ int64_t datastart_offset;
+ int64_t datasize_offset;
+ int64_t datasize;
+ int64_t videosize_offset;
+ int64_t videosize;
+ int64_t audiosize_offset;
+ int64_t audiosize;
+
+ int64_t metadata_size_pos;
+ int64_t metadata_totalsize_pos;
+ int64_t metadata_totalsize;
+ int64_t keyframe_index_size;
+
+ int64_t lasttimestamp_offset;
+ double lasttimestamp;
+ int64_t lastkeyframetimestamp_offset;
+ double lastkeyframetimestamp;
+ int64_t lastkeyframelocation_offset;
+ int64_t lastkeyframelocation;
+
+ int acurframeindex;
+ int64_t keyframes_info_offset;
+
+ int64_t filepositions_count;
+ FLVFileposition *filepositions;
+ FLVFileposition *head_filepositions;
+
AVCodecParameters *audio_par;
AVCodecParameters *video_par;
double framerate;
return FLV_CODECID_SPEEX | FLV_SAMPLERATE_11025HZ | FLV_SAMPLESSIZE_16BIT;
} else {
switch (par->sample_rate) {
+ case 48000:
+ // 48khz mp3 is stored with 44k1 samplerate identifer
+ if (par->codec_id == AV_CODEC_ID_MP3) {
+ flags |= FLV_SAMPLERATE_44100HZ;
+ break;
+ } else {
+ goto error;
+ }
case 44100:
flags |= FLV_SAMPLERATE_44100HZ;
break;
break;
}
default:
+error:
av_log(s, AV_LOG_ERROR,
"FLV does not support sample rate %d, "
"choose from (44100, 22050, 11025)\n", par->sample_rate);
avio_wb64(pb, av_double2int(d));
}
+static void put_amf_byte(AVIOContext *pb, unsigned char abyte)
+{
+ avio_w8(pb, abyte);
+}
+
+static void put_amf_dword_array(AVIOContext *pb, uint32_t dw)
+{
+ avio_w8(pb, AMF_DATA_TYPE_ARRAY);
+ avio_wb32(pb, dw);
+}
+
static void put_amf_bool(AVIOContext *pb, int b)
{
avio_w8(pb, AMF_DATA_TYPE_BOOL);
{
AVIOContext *pb = s->pb;
FLVContext *flv = s->priv_data;
+ int write_duration_filesize = !(flv->flags & FLV_NO_DURATION_FILESIZE);
int metadata_count = 0;
- int64_t metadata_size_pos, data_size, metadata_count_pos;
+ int64_t metadata_count_pos;
AVDictionaryEntry *tag = NULL;
/* write meta_tag */
- avio_w8(pb, 18); // tag type META
- metadata_size_pos = avio_tell(pb);
+ avio_w8(pb, FLV_TAG_TYPE_META); // tag type META
+ flv->metadata_size_pos = avio_tell(pb);
avio_wb24(pb, 0); // size of data part (sum of all parts below)
avio_wb24(pb, ts); // timestamp
avio_wb32(pb, 0); // reserved
metadata_count = 4 * !!flv->video_par +
5 * !!flv->audio_par +
1 * !!flv->data_par;
- if (pb->seekable) {
+ if (write_duration_filesize) {
metadata_count += 2; // +2 for duration and file size
}
avio_wb32(pb, metadata_count);
- if (pb->seekable) {
+ if (write_duration_filesize) {
put_amf_string(pb, "duration");
flv->duration_offset = avio_tell(pb);
// fill in the guessed duration, it'll be corrected later if incorrect
metadata_count++;
}
- if (pb->seekable) {
+ if (write_duration_filesize) {
put_amf_string(pb, "filesize");
flv->filesize_offset = avio_tell(pb);
put_amf_double(pb, 0); // delayed write
}
+ if (flv->flags & FLV_ADD_KEYFRAME_INDEX) {
+ flv->acurframeindex = 0;
+ flv->keyframe_index_size = 0;
+
+ put_amf_string(pb, "hasVideo");
+ put_amf_bool(pb, !!flv->video_par);
+ metadata_count++;
+
+ put_amf_string(pb, "hasKeyframes");
+ put_amf_bool(pb, 1);
+ metadata_count++;
+
+ put_amf_string(pb, "hasAudio");
+ put_amf_bool(pb, !!flv->audio_par);
+ metadata_count++;
+
+ put_amf_string(pb, "hasMetadata");
+ put_amf_bool(pb, 1);
+ metadata_count++;
+
+ put_amf_string(pb, "canSeekToEnd");
+ put_amf_bool(pb, 1);
+ metadata_count++;
+
+ put_amf_string(pb, "datasize");
+ flv->datasize_offset = avio_tell(pb);
+ flv->datasize = 0;
+ put_amf_double(pb, flv->datasize);
+ metadata_count++;
+
+ put_amf_string(pb, "videosize");
+ flv->videosize_offset = avio_tell(pb);
+ flv->videosize = 0;
+ put_amf_double(pb, flv->videosize);
+ metadata_count++;
+
+ put_amf_string(pb, "audiosize");
+ flv->audiosize_offset = avio_tell(pb);
+ flv->audiosize = 0;
+ put_amf_double(pb, flv->audiosize);
+ metadata_count++;
+
+ put_amf_string(pb, "lasttimestamp");
+ flv->lasttimestamp_offset = avio_tell(pb);
+ flv->lasttimestamp = 0;
+ put_amf_double(pb, 0);
+ metadata_count++;
+
+ put_amf_string(pb, "lastkeyframetimestamp");
+ flv->lastkeyframetimestamp_offset = avio_tell(pb);
+ flv->lastkeyframetimestamp = 0;
+ put_amf_double(pb, 0);
+ metadata_count++;
+
+ put_amf_string(pb, "lastkeyframelocation");
+ flv->lastkeyframelocation_offset = avio_tell(pb);
+ flv->lastkeyframelocation = 0;
+ put_amf_double(pb, 0);
+ metadata_count++;
+
+ put_amf_string(pb, "keyframes");
+ put_amf_byte(pb, AMF_DATA_TYPE_OBJECT);
+ metadata_count++;
+
+ flv->keyframes_info_offset = avio_tell(pb);
+ }
+
put_amf_string(pb, "");
avio_w8(pb, AMF_END_OF_OBJECT);
/* write total size of tag */
- data_size = avio_tell(pb) - metadata_size_pos - 10;
+ flv->metadata_totalsize = avio_tell(pb) - flv->metadata_size_pos - 10;
avio_seek(pb, metadata_count_pos, SEEK_SET);
avio_wb32(pb, metadata_count);
- avio_seek(pb, metadata_size_pos, SEEK_SET);
- avio_wb24(pb, data_size);
- avio_skip(pb, data_size + 10 - 3);
- avio_wb32(pb, data_size + 11);
+ avio_seek(pb, flv->metadata_size_pos, SEEK_SET);
+ avio_wb24(pb, flv->metadata_totalsize);
+ avio_skip(pb, flv->metadata_totalsize + 10 - 3);
+ flv->metadata_totalsize_pos = avio_tell(pb);
+ avio_wb32(pb, flv->metadata_totalsize + 11);
}
static int unsupported_codec(AVFormatContext *s,
}
}
+static int flv_append_keyframe_info(AVFormatContext *s, FLVContext *flv, double ts, int64_t pos)
+{
+ FLVFileposition *position = av_malloc(sizeof(FLVFileposition));
+
+ if (!position) {
+ av_log(s, AV_LOG_WARNING, "no mem for add keyframe index!\n");
+ return AVERROR(ENOMEM);
+ }
+
+ position->keyframe_timestamp = ts;
+ position->keyframe_position = pos;
+
+ if (!flv->filepositions_count) {
+ flv->filepositions = position;
+ flv->head_filepositions = flv->filepositions;
+ position->next = NULL;
+ } else {
+ flv->filepositions->next = position;
+ position->next = NULL;
+ flv->filepositions = flv->filepositions->next;
+ }
+
+ flv->filepositions_count++;
+
+ return 0;
+}
+
+static int shift_data(AVFormatContext *s)
+{
+ int ret = 0;
+ int n = 0;
+ int64_t metadata_size = 0;
+ FLVContext *flv = s->priv_data;
+ int64_t pos, pos_end = avio_tell(s->pb);
+ uint8_t *buf, *read_buf[2];
+ int read_buf_id = 0;
+ int read_size[2];
+ AVIOContext *read_pb;
+
+ metadata_size = flv->filepositions_count * 9 * 2 + 10; /* filepositions and times value */
+ metadata_size += 2 + 13; /* filepositions String */
+ metadata_size += 2 + 5; /* times String */
+ metadata_size += 3; /* Object end */
+
+ flv->keyframe_index_size = metadata_size;
+
+ if (metadata_size < 0)
+ return metadata_size;
+
+ buf = av_malloc_array(metadata_size, 2);
+ if (!buf) {
+ return AVERROR(ENOMEM);
+ }
+ read_buf[0] = buf;
+ read_buf[1] = buf + metadata_size;
+
+ avio_seek(s->pb, flv->metadata_size_pos, SEEK_SET);
+ avio_wb24(s->pb, flv->metadata_totalsize + metadata_size);
+
+ avio_seek(s->pb, flv->metadata_totalsize_pos, SEEK_SET);
+ avio_wb32(s->pb, flv->metadata_totalsize + 11 + metadata_size);
+ avio_seek(s->pb, pos_end, SEEK_SET);
+
+ /* Shift the data: the AVIO context of the output can only be used for
+ * writing, so we re-open the same output, but for reading. It also avoids
+ * a read/seek/write/seek back and forth. */
+ avio_flush(s->pb);
+ ret = s->io_open(s, &read_pb, s->filename, AVIO_FLAG_READ, NULL);
+ if (ret < 0) {
+ av_log(s, AV_LOG_ERROR, "Unable to re-open %s output file for "
+ "the second pass (add_keyframe_index)\n", s->filename);
+ goto end;
+ }
+
+ /* mark the end of the shift to up to the last data we wrote, and get ready
+ * for writing */
+ pos_end = avio_tell(s->pb);
+ avio_seek(s->pb, flv->keyframes_info_offset + metadata_size, SEEK_SET);
+
+ /* start reading at where the keyframe index information will be placed */
+ avio_seek(read_pb, flv->keyframes_info_offset, SEEK_SET);
+ pos = avio_tell(read_pb);
+
+#define READ_BLOCK do { \
+ read_size[read_buf_id] = avio_read(read_pb, read_buf[read_buf_id], metadata_size); \
+ read_buf_id ^= 1; \
+} while (0)
+
+ /* shift data by chunk of at most keyframe *filepositions* and *times* size */
+ READ_BLOCK;
+ do {
+ READ_BLOCK;
+ n = read_size[read_buf_id];
+ if (n < 0)
+ break;
+ avio_write(s->pb, read_buf[read_buf_id], n);
+ pos += n;
+ } while (pos <= pos_end);
+
+ ff_format_io_close(s, &read_pb);
+
+end:
+ av_free(buf);
+ return ret;
+}
+
+
static int flv_write_header(AVFormatContext *s)
{
int i;
flv->reserved = 5;
}
- write_metadata(s, 0);
+ if (flv->flags & FLV_NO_METADATA) {
+ pb->seekable = 0;
+ } else {
+ write_metadata(s, 0);
+ }
for (i = 0; i < s->nb_streams; i++) {
flv_write_codec_header(s, s->streams[i]->codecpar);
}
+ flv->datastart_offset = avio_tell(pb);
return 0;
}
static int flv_write_trailer(AVFormatContext *s)
{
int64_t file_size;
-
AVIOContext *pb = s->pb;
FLVContext *flv = s->priv_data;
- int i;
+ int build_keyframes_idx = flv->flags & FLV_ADD_KEYFRAME_INDEX;
+ int i, res;
+ int64_t cur_pos = avio_tell(s->pb);
+
+ if (build_keyframes_idx) {
+ FLVFileposition *newflv_posinfo, *p;
+
+ avio_seek(pb, flv->videosize_offset, SEEK_SET);
+ put_amf_double(pb, flv->videosize);
+
+ avio_seek(pb, flv->audiosize_offset, SEEK_SET);
+ put_amf_double(pb, flv->audiosize);
+
+ avio_seek(pb, flv->lasttimestamp_offset, SEEK_SET);
+ put_amf_double(pb, flv->lasttimestamp);
+
+ avio_seek(pb, flv->lastkeyframetimestamp_offset, SEEK_SET);
+ put_amf_double(pb, flv->lastkeyframetimestamp);
+ avio_seek(pb, flv->lastkeyframelocation_offset, SEEK_SET);
+ put_amf_double(pb, flv->lastkeyframelocation + flv->keyframe_index_size);
+ avio_seek(pb, cur_pos, SEEK_SET);
+
+ res = shift_data(s);
+ if (res < 0) {
+ goto end;
+ }
+ avio_seek(pb, flv->keyframes_info_offset, SEEK_SET);
+ put_amf_string(pb, "filepositions");
+ put_amf_dword_array(pb, flv->filepositions_count);
+ for (newflv_posinfo = flv->head_filepositions; newflv_posinfo; newflv_posinfo = newflv_posinfo->next) {
+ put_amf_double(pb, newflv_posinfo->keyframe_position + flv->keyframe_index_size);
+ }
+
+ put_amf_string(pb, "times");
+ put_amf_dword_array(pb, flv->filepositions_count);
+ for (newflv_posinfo = flv->head_filepositions; newflv_posinfo; newflv_posinfo = newflv_posinfo->next) {
+ put_amf_double(pb, newflv_posinfo->keyframe_timestamp);
+ }
+
+ newflv_posinfo = flv->head_filepositions;
+ while (newflv_posinfo) {
+ p = newflv_posinfo->next;
+ if (p) {
+ newflv_posinfo->next = p->next;
+ av_free(p);
+ p = NULL;
+ } else {
+ av_free(newflv_posinfo);
+ newflv_posinfo = NULL;
+ }
+ }
+
+ put_amf_string(pb, "");
+ avio_w8(pb, AMF_END_OF_OBJECT);
+
+ avio_seek(pb, cur_pos + flv->keyframe_index_size, SEEK_SET);
+ }
+
+end:
if (flv->flags & FLV_NO_SEQUENCE_END) {
av_log(s, AV_LOG_DEBUG, "FLV no sequence end mode open\n");
} else {
file_size = avio_tell(pb);
- if (pb->seekable) {
+ if (build_keyframes_idx) {
+ flv->datasize = file_size - flv->datastart_offset;
+ avio_seek(pb, flv->datasize_offset, SEEK_SET);
+ put_amf_double(pb, flv->datasize);
+ }
+ if (!(flv->flags & FLV_NO_DURATION_FILESIZE)) {
/* update information */
if (avio_seek(pb, flv->duration_offset, SEEK_SET) < 0) {
av_log(s, AV_LOG_WARNING, "Failed to update header with correct duration.\n");
int size = pkt->size;
uint8_t *data = NULL;
int flags = -1, flags_size, ret;
+ int64_t cur_offset = avio_tell(pb);
if (par->codec_id == AV_CODEC_ID_VP6F || par->codec_id == AV_CODEC_ID_VP6A ||
par->codec_id == AV_CODEC_ID_VP6 || par->codec_id == AV_CODEC_ID_AAC)
if (side && side_size > 0 && (side_size != par->extradata_size || memcmp(side, par->extradata, side_size))) {
av_free(par->extradata);
par->extradata = av_mallocz(side_size + AV_INPUT_BUFFER_PADDING_SIZE);
+ if (!par->extradata) {
+ par->extradata_size = 0;
+ return AVERROR(ENOMEM);
+ }
memcpy(par->extradata, side, side_size);
par->extradata_size = side_size;
flv_write_codec_header(s, par);
pkt->pts + flv->delay + pkt->duration);
}
+ if (flv->flags & FLV_ADD_KEYFRAME_INDEX) {
+ switch (par->codec_type) {
+ case AVMEDIA_TYPE_VIDEO:
+ flv->videosize += (avio_tell(pb) - cur_offset);
+ flv->lasttimestamp = flv->acurframeindex / flv->framerate;
+ if (pkt->flags & AV_PKT_FLAG_KEY) {
+ double ts = flv->acurframeindex / flv->framerate;
+ int64_t pos = cur_offset;
+
+ flv->lastkeyframetimestamp = flv->acurframeindex / flv->framerate;
+ flv->lastkeyframelocation = pos;
+ flv_append_keyframe_info(s, flv, ts, pos);
+ }
+ flv->acurframeindex++;
+ break;
+
+ case AVMEDIA_TYPE_AUDIO:
+ flv->audiosize += (avio_tell(pb) - cur_offset);
+ break;
+
+ default:
+ av_log(s, AV_LOG_WARNING, "par->codec_type is type = [%d]\n", par->codec_type);
+ break;
+ }
+ }
+
av_free(data);
return pb->error;
{ "flvflags", "FLV muxer flags", offsetof(FLVContext, flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
{ "aac_seq_header_detect", "Put AAC sequence header based on stream data", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_AAC_SEQ_HEADER_DETECT}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
{ "no_sequence_end", "disable sequence end for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_SEQUENCE_END}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
+ { "no_metadata", "disable metadata for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_METADATA}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
+ { "no_duration_filesize", "disable duration and filesize zero value metadata for FLV", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_NO_DURATION_FILESIZE}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
+ { "add_keyframe_index", "Add keyframe index metadata", 0, AV_OPT_TYPE_CONST, {.i64 = FLV_ADD_KEYFRAME_INDEX}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "flvflags" },
{ NULL },
};
projects / ffmpeg / blobdiff