46 #define BUFFER_DURATION 0
48 #define MAX_HEADER_SIZE (7 + 4 + 12)
50 #define MAX_PACKET_SIZE (UINT16_MAX - MAX_HEADER_SIZE)
70 int data_size,
int index_pos)
75 unsigned char *data_offset_ptr, *start_ptr;
76 const char *
desc, *mimetype;
77 int nb_packets, packet_total_size, packet_max_size,
size, packet_avg_size, i;
93 packet_total_size = 0;
113 packet_avg_size = packet_total_size / nb_packets;
122 data_offset_ptr =
s->buf_ptr;
148 stream = &rm->streams[i];
151 desc =
"The Audio Stream";
152 mimetype =
"audio/x-pn-realaudio";
153 codec_data_size = 73;
155 desc =
"The Video Stream";
156 mimetype =
"video/x-pn-realvideo";
157 codec_data_size = 34;
161 size = 10 + 9 * 4 + strlen(
desc) + strlen(mimetype) + codec_data_size;
169 if (stream->nb_packets > 0)
170 packet_avg_size = stream->packet_total_size /
189 sample_rate = stream->par->sample_rate;
190 coded_frame_size = (stream->par->bit_rate *
201 switch(sample_rate) {
221 if (coded_frame_size == 557)
235 if (stream->par->codec_tag) {
257 if (stream->frame_rate.num / stream->frame_rate.den > 65535) {
258 av_log(
s,
AV_LOG_ERROR,
"Frame rate %d is too high\n", stream->frame_rate.num / stream->frame_rate.den);
262 avio_wb16(
s, stream->frame_rate.num / stream->frame_rate.den);
264 avio_wb16(
s, stream->frame_rate.num / stream->frame_rate.den);
279 data_pos =
s->buf_ptr - start_ptr;
280 rm->data_pos = data_pos;
281 data_offset_ptr[0] = data_pos >> 24;
282 data_offset_ptr[1] = data_pos >> 16;
283 data_offset_ptr[2] = data_pos >> 8;
284 data_offset_ptr[3] = data_pos;
297 int length,
int key_frame)
324 av_log(s,
AV_LOG_ERROR,
"At most 2 streams are currently supported for muxing in RM\n");
381 for (i = 0; i <
size; i += 2) {
404 av_log(s,
AV_LOG_ERROR,
"Muxing packets larger than 64 kB (%d) is not supported\n", size);
444 int data_size, index_pos, i;
450 data_size = index_pos - rm->
data_pos;
475 .mime_type =
"application/vnd.rn-realmedia",
476 .extensions =
"rm,ra",
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
static int rm_write_audio(AVFormatContext *s, const uint8_t *buf, int size, int flags)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
unsigned char * buf_ptr
Current position in the buffer.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
This struct describes the properties of an encoded stream.
void avio_wl32(AVIOContext *s, unsigned int val)
int id
Format-specific stream ID.
AVStream ** streams
A list of all streams in the file.
static void put_str(AVIOContext *s, const char *tag)
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
static void put_str8(AVIOContext *s, const char *tag)
StreamInfo * audio_stream
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
AVDictionary * metadata
Metadata that applies to the whole file.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
enum AVMediaType codec_type
General type of the encoded data.
int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes)
This function is the same as av_get_audio_frame_duration(), except it works with AVCodecParameters in...
int flags
A combination of AV_PKT_FLAG values.
static void write_packet_header(AVFormatContext *ctx, StreamInfo *stream, int length, int key_frame)
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
static int write_trailer(AVFormatContext *s1)
static int rm_write_header(AVFormatContext *s)
static int rm_write_packet(AVFormatContext *s, AVPacket *pkt)
#define FF_ARRAY_ELEMS(a)
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
const AVCodecTag ff_rm_codec_tags[]
AVIOContext * pb
I/O context.
void avio_w8(AVIOContext *s, int b)
Rational number (pair of numerator and denominator).
static int rm_write_trailer(AVFormatContext *s)
void avio_wb16(AVIOContext *s, unsigned int val)
const char *const ff_rm_metadata[4]
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
int sample_rate
Audio only.
AVOutputFormat ff_rm_muxer
static int rv10_write_header(AVFormatContext *ctx, int data_size, int index_pos)
void * priv_data
Format private data.
static void write_header(FFV1Context *f)
void avio_wb32(AVIOContext *s, unsigned int val)
AVCodecParameters * codecpar
int64_t av_rescale_q_rnd(int64_t a, AVRational bq, AVRational cq, enum AVRounding rnd)
Rescale a 64-bit integer by 2 rational numbers with specified rounding.
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
static int rm_write_video(AVFormatContext *s, const uint8_t *buf, int size, int flags)
This structure stores compressed data.
StreamInfo * video_stream