59 if (!strcmp(sample_fmt_info[i].name, name))
68 if (sample_fmt_info[sample_fmt].planar)
77 if (sample_fmt_info[sample_fmt].planar)
86 snprintf(buf, buf_size,
"name " " depth");
89 snprintf (buf, buf_size,
"%-6s" " %2d ", info.
name, info.
bits);
116 if (!sample_size || nb_samples <= 0 || nb_channels <= 0)
121 if (nb_samples > INT_MAX - 31)
124 nb_samples =
FFALIGN(nb_samples, 32);
128 if (nb_channels > INT_MAX / align ||
129 (int64_t)nb_channels * nb_samples > (INT_MAX - (align * nb_channels)) / sample_size)
132 line_size = planar ?
FFALIGN(nb_samples * sample_size, align) :
133 FFALIGN(nb_samples * sample_size * nb_channels, align);
135 *linesize = line_size;
137 return planar ? line_size * nb_channels : line_size;
144 int ch, planar, buf_size, line_size;
154 audio_data[ch] = audio_data[ch-1] + line_size;
157 *linesize = line_size;
176 nb_samples, sample_fmt, align);
192 int planes = planar ? nb_channels : 1;
194 int data_size = nb_samples * block_align;
197 dst_offset *= block_align;
198 src_offset *= block_align;
200 for (i = 0; i < planes; i++)
201 memcpy(dst[i] + dst_offset, src[i] + src_offset, data_size);
210 int planes = planar ? nb_channels : 1;
212 int data_size = nb_samples * block_align;
217 offset *= block_align;
219 for (i = 0; i < planes; i++)
220 memset(audio_data[i] + offset, fill_char, data_size);
Number of sample formats. DO NOT USE if linking dynamically.
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
int av_samples_get_buffer_size(int *linesize, int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align)
Get the required buffer size for the given audio parameters.
struct SampleFmtInfo SampleFmtInfo
enum AVSampleFormat altform
planar<->packed alternative form
static const SampleFmtInfo sample_fmt_info[AV_SAMPLE_FMT_NB]
this table gives more information about formats
int av_samples_fill_arrays(uint8_t **audio_data, int *linesize, const uint8_t *buf, int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align)
Fill channel data pointers and linesize for samples with sample format sample_fmt.
enum AVSampleFormat av_get_planar_sample_fmt(enum AVSampleFormat sample_fmt)
Get the planar alternative form of the given sample format.
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
int av_samples_set_silence(uint8_t **audio_data, int offset, int nb_samples, int nb_channels, enum AVSampleFormat sample_fmt)
Fill an audio buffer with silence.
enum AVSampleFormat av_get_packed_sample_fmt(enum AVSampleFormat sample_fmt)
Get the packed alternative form of the given sample format.
const char * av_get_sample_fmt_name(enum AVSampleFormat sample_fmt)
Return the name of sample_fmt, or NULL if sample_fmt is not recognized.
int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt)
Return number of bytes per sample.
int av_samples_alloc(uint8_t **audio_data, int *linesize, int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align)
Allocate a samples buffer for nb_samples samples, and fill data pointers and linesize accordingly...
char * av_get_sample_fmt_string(char *buf, int buf_size, enum AVSampleFormat sample_fmt)
Generate a string corresponding to the sample format with sample_fmt, or a header if sample_fmt is ne...
int av_samples_copy(uint8_t **dst, uint8_t *const *src, int dst_offset, int src_offset, int nb_samples, int nb_channels, enum AVSampleFormat sample_fmt)
Copy samples from src to dst.
int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt)
Check if the sample format is planar.
common internal and external API header
AVSampleFormat
Audio Sample Formats.
enum AVSampleFormat av_get_sample_fmt(const char *name)
Return a sample format corresponding to name, or AV_SAMPLE_FMT_NONE on error.