54 int waveformatextensible;
57 uint8_t *riff_extradata_start = temp;
73 if (waveformatextensible)
94 "requested bits_per_coded_sample (%d) " 95 "and actually stored (%d) differ\n",
126 bytestream_put_le16(&riff_extradata, 1);
127 bytestream_put_le32(&riff_extradata, 2);
128 bytestream_put_le16(&riff_extradata, 1152);
129 bytestream_put_le16(&riff_extradata, 1);
130 bytestream_put_le16(&riff_extradata, 1393);
134 bytestream_put_le16(&riff_extradata, 2);
136 bytestream_put_le32(&riff_extradata, enc->
bit_rate);
138 bytestream_put_le16(&riff_extradata, enc->
channels == 2 ? 1 : 8);
140 bytestream_put_le16(&riff_extradata, 0);
142 bytestream_put_le16(&riff_extradata, 1);
144 bytestream_put_le16(&riff_extradata, 16);
146 bytestream_put_le32(&riff_extradata, 0);
148 bytestream_put_le32(&riff_extradata, 0);
153 bytestream_put_le16(&riff_extradata, frame_size);
160 if (waveformatextensible) {
163 avio_wl16(pb, riff_extradata - riff_extradata_start + 22);
174 avio_wl16(pb, riff_extradata - riff_extradata_start);
176 avio_write(pb, riff_extradata_start, riff_extradata - riff_extradata_start);
213 int *au_ssize,
int *au_scale)
217 int audio_frame_size;
223 if (!audio_frame_size)
228 *au_scale = audio_frame_size;
240 gcd =
av_gcd(*au_scale, *au_rate);
247 int len = strlen(str);
259 "IARL",
"IART",
"ICMS",
"ICMT",
"ICOP",
"ICRD",
"ICRP",
"IDIM",
"IDPI",
260 "IENG",
"IGNR",
"IKEY",
"ILGT",
"ILNG",
"IMED",
"INAM",
"IPLT",
"IPRD",
261 "IPRT",
"ITRK",
"ISBJ",
"ISFT",
"ISHP",
"ISMP",
"ISRC",
"ISRF",
"ITCH",
void avio_wl16(AVIOContext *s, unsigned int val)
#define AV_LOG_WARNING
Something somehow does not look correct.
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
void ff_parse_specific_params(AVStream *st, int *au_rate, int *au_ssize, int *au_scale)
void avio_wl32(AVIOContext *s, unsigned int val)
Opaque data information usually continuous.
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
static av_always_inline void ffio_wfourcc(AVIOContext *pb, const uint8_t *s)
int ff_put_wav_header(AVIOContext *pb, AVCodecContext *enc)
void ff_riff_write_info(AVFormatContext *s)
Write all recognized RIFF tags from s->metadata.
static const uint8_t frame_size[4]
#define AV_DICT_MATCH_CASE
AVDictionary * metadata
Metadata that applies to the whole file.
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
preferred ID for decoding MPEG audio layer 1, 2 or 3
int64_t av_gcd(int64_t a, int64_t b)
Return the greatest common divisor of a and b.
void av_log(void *avcl, int level, const char *fmt,...)
uint64_t channel_layout
Audio channel layout.
AVCodecContext * codec
Codec context associated with this stream.
int bit_rate
the average bitrate
int width
picture width / height.
void ff_end_tag(AVIOContext *pb, int64_t start)
internal header for RIFF based (de)muxers do NOT include this in end user applications ...
void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str)
Write a single RIFF info tag.
int avio_put_str(AVIOContext *s, const char *str)
Write a NULL-terminated string.
int frame_size
Number of samples per channel in an audio frame.
Libavcodec external API header.
enum AVMediaType codec_type
int64_t ff_start_tag(AVIOContext *pb, const char *tag)
int sample_rate
samples per second
AVIOContext * pb
I/O context.
static const char riff_tags[][5]
void avio_w8(AVIOContext *s, int b)
main external API structure.
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
static int riff_has_valid_tags(AVFormatContext *s)
int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
Return audio frame duration.
const AVMetadataConv ff_riff_info_conv[]
void ff_put_bmp_header(AVIOContext *pb, AVCodecContext *enc, const AVCodecTag *tags, int for_asf)
int channels
number of audio channels
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...