53 return sample_fmt_info[sample_fmt].
name;
61 if (!strcmp(sample_fmt_info[i].name, name))
70 if (sample_fmt_info[sample_fmt].planar == planar)
72 return sample_fmt_info[sample_fmt].
altform;
79 if (sample_fmt_info[sample_fmt].
planar)
80 return sample_fmt_info[sample_fmt].
altform;
88 if (sample_fmt_info[sample_fmt].
planar)
90 return sample_fmt_info[sample_fmt].
altform;
97 snprintf(buf, buf_size,
"name " " depth");
109 0 : sample_fmt_info[sample_fmt].
bits >> 3;
116 return sample_fmt_info[sample_fmt].
planar;
127 if (!sample_size || nb_samples <= 0 || nb_channels <= 0)
132 if (nb_samples > INT_MAX - 31)
135 nb_samples =
FFALIGN(nb_samples, 32);
139 if (nb_channels > INT_MAX / align ||
140 (int64_t)nb_channels * nb_samples > (INT_MAX - (align * nb_channels)) / sample_size)
143 line_size = planar ?
FFALIGN(nb_samples * sample_size, align) :
144 FFALIGN(nb_samples * sample_size * nb_channels, align);
146 *linesize = line_size;
148 return planar ? line_size *
nb_channels : line_size;
155 int ch,
planar, buf_size, line_size;
163 audio_data[0] = (
uint8_t *)buf;
165 audio_data[ch] = audio_data[ch-1] + line_size;
168 *linesize = line_size;
187 nb_samples, sample_fmt, align);
203 *audio_data =
av_calloc(nb_planes,
sizeof(**audio_data));
207 nb_samples, sample_fmt, align);
220 int data_size = nb_samples * block_align;
223 dst_offset *= block_align;
224 src_offset *= block_align;
226 if((dst[0] < src[0] ? src[0] - dst[0] : dst[0] - src[0]) >= data_size) {
227 for (i = 0; i <
planes; i++)
228 memcpy(dst[i] + dst_offset, src[i] + src_offset, data_size);
230 for (i = 0; i <
planes; i++)
231 memmove(dst[i] + dst_offset, src[i] + src_offset, data_size);
243 int data_size = nb_samples * block_align;
248 offset *= block_align;
250 for (i = 0; i <
planes; i++)
251 memset(audio_data[i] + offset, fill_char, data_size);
Number of sample formats. DO NOT USE if linking dynamically.
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...
enum AVSampleFormat altform
planar<->packed alternative form
int av_samples_alloc_array_and_samples(uint8_t ***audio_data, int *linesize, int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align)
Allocate a data pointers array, samples buffer for nb_samples samples, and fill data pointers and lin...
static const SampleFmtInfo sample_fmt_info[AV_SAMPLE_FMT_NB]
this table gives more information about formats
void * av_calloc(size_t nmemb, size_t size)
Non-inlined equivalent of av_mallocz_array().
enum AVSampleFormat av_get_planar_sample_fmt(enum AVSampleFormat sample_fmt)
Get the planar alternative form of the given sample format.
int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt)
Check if the sample format is planar.
#define i(width, name, range_min, range_max)
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.
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.
static const uint8_t offset[127][2]
static const struct @315 planes[]
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...
AVSampleFormat
Audio sample formats.
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_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.
enum AVSampleFormat av_get_sample_fmt(const char *name)
Return a sample format corresponding to name, or AV_SAMPLE_FMT_NONE on error.
int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt)
Return number of bytes per sample.
enum AVSampleFormat av_get_alt_sample_fmt(enum AVSampleFormat sample_fmt, int planar)
Return the planar<->packed alternative form of the given sample format, or AV_SAMPLE_FMT_NONE on erro...
common internal and external API header
enum AVSampleFormat av_get_packed_sample_fmt(enum AVSampleFormat sample_fmt)
Get the packed alternative form of the given sample format.
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 plane data pointers and linesize for samples with sample format sample_fmt.