60 int waveformatextensible;
86 if (waveformatextensible)
109 "requested bits_per_coded_sample (%d) "
110 "and actually stored (%d) differ\n",
117 blkalign = 576 * (par->
sample_rate <= (24000 + 32000)/2 ? 1 : 2);
144 bytestream_put_le16(&riff_extradata, 1);
145 bytestream_put_le32(&riff_extradata, 2);
146 bytestream_put_le16(&riff_extradata, 1152);
147 bytestream_put_le16(&riff_extradata, 1);
148 bytestream_put_le16(&riff_extradata, 1393);
151 bytestream_put_le16(&riff_extradata, 2);
153 bytestream_put_le32(&riff_extradata, par->
bit_rate);
155 bytestream_put_le16(&riff_extradata, par->
channels == 2 ? 1 : 8);
157 bytestream_put_le16(&riff_extradata, 0);
159 bytestream_put_le16(&riff_extradata, 1);
161 bytestream_put_le16(&riff_extradata, 16);
163 bytestream_put_le32(&riff_extradata, 0);
165 bytestream_put_le32(&riff_extradata, 0);
167 bytestream_put_le32(&riff_extradata, 0x9ace0002);
168 bytestream_put_le32(&riff_extradata, 0xaea2f732);
169 bytestream_put_le16(&riff_extradata, 0xacde);
173 bytestream_put_le16(&riff_extradata,
frame_size);
179 if (waveformatextensible) {
184 avio_wl16(pb, riff_extradata - riff_extradata_start + 22);
200 riff_extradata - riff_extradata_start) {
202 avio_wl16(pb, riff_extradata - riff_extradata_start);
204 avio_write(pb, riff_extradata_start, riff_extradata - riff_extradata_start);
216 int for_asf,
int ignore_extradata,
int rgb_frame_is_flipped)
220 int keep_height = flipped_extradata || rgb_frame_is_flipped;
227 pal_avi = !for_asf &&
233 avio_wl32(pb, 40 + (ignore_extradata || pal_avi ? 0 : extradata_size));
252 if (!ignore_extradata) {
255 if (!for_asf && extradata_size & 1)
257 }
else if (pal_avi) {
273 int *au_ssize,
int *au_scale)
277 int audio_frame_size;
280 if (!audio_frame_size)
285 *au_scale = audio_frame_size;
297 gcd =
av_gcd(*au_scale, *au_rate);
305 if (
len > 0 &&
len < UINT32_MAX) {
316 "IARL",
"IART",
"IAS1",
"IAS2",
"IAS3",
"IAS4",
"IAS5",
"IAS6",
"IAS7",
317 "IAS8",
"IAS9",
"ICMS",
"ICMT",
"ICOP",
"ICRD",
"ICRP",
"IDIM",
"IDPI",
318 "IENG",
"IGNR",
"IKEY",
"ILGT",
"ILNG",
"IMED",
"INAM",
"IPLT",
"IPRD",
319 "IPRT",
"ITRK",
"ISBJ",
"ISFT",
"ISHP",
"ISMP",
"ISRC",
"ISRF",
"ITCH",
366 if (
id == av_guid[
i].
id)
367 return &(av_guid[
i].
guid);
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Libavcodec external API header.
#define FF_COMPLIANCE_NORMAL
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
void avio_wl32(AVIOContext *s, unsigned int val)
void avio_wl16(AVIOContext *s, unsigned int val)
int avio_put_str(AVIOContext *s, const char *str)
Write a NULL-terminated string.
void avio_w8(AVIOContext *s, int b)
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)
#define flags(name, subs,...)
static enum AVPixelFormat pix_fmt
#define AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_STEREO
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
AVCodecID
Identify the syntax and semantics of the bitstream.
@ AV_CODEC_ID_ADPCM_IMA_WAV
@ AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
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...
#define AV_DICT_MATCH_CASE
Only get an entry with exact-case key match.
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
#define AV_LOG_WARNING
Something somehow does not look correct.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
int64_t av_gcd(int64_t a, int64_t b)
Compute the greatest common divisor of two integer operands.
@ AVMEDIA_TYPE_DATA
Opaque data information usually continuous.
AVPixelFormat
Pixel format.
@ AV_PIX_FMT_MONOBLACK
Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb.
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
@ AV_PIX_FMT_MONOWHITE
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb.
const AVCodecGuid ff_codec_wav_guids[]
const AVMetadataConv ff_riff_info_conv[]
internal header for RIFF based (de)muxers do NOT include this in end user applications
#define FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX
Tell ff_put_wav_header() to use WAVEFORMATEX even for PCM codecs.
#define FF_PUT_WAV_HEADER_SKIP_CHANNELMASK
Tell ff_put_wav_header() to write an empty channel mask.
void ff_end_tag(AVIOContext *pb, int64_t start)
void ff_riff_write_info_tag(AVIOContext *pb, const char *tag, const char *str)
Write a single RIFF info tag.
void ff_riff_write_info(AVFormatContext *s)
Write all recognized RIFF tags from s->metadata.
static const char riff_tags[][5]
const ff_asf_guid * ff_get_codec_guid(enum AVCodecID id, const AVCodecGuid *av_guid)
void ff_put_bmp_header(AVIOContext *pb, AVCodecParameters *par, int for_asf, int ignore_extradata, int rgb_frame_is_flipped)
int64_t ff_start_tag(AVIOContext *pb, const char *tag)
void ff_parse_specific_params(AVStream *st, int *au_rate, int *au_ssize, int *au_scale)
int ff_put_wav_header(AVFormatContext *s, AVIOContext *pb, AVCodecParameters *par, int flags)
Write WAVEFORMAT header structure.
static int riff_has_valid_tags(AVFormatContext *s)
void ff_put_guid(AVIOContext *s, const ff_asf_guid *g)
This struct describes the properties of an encoded stream.
int extradata_size
Size of the extradata content in bytes.
int frame_size
Audio only.
uint64_t channel_layout
Audio only.
int bits_per_coded_sample
The number of bits per sample in the codedwords.
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
enum AVMediaType codec_type
General type of the encoded data.
int block_align
Audio only.
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
int sample_rate
Audio only.
AVCodecParameters * codecpar
Codec parameters associated with this stream.
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.