/* * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "common.h"#include "samplefmt.h" #include <stdio.h>#include <stdlib.h>#include <string.h> typedef struct SampleFmtInfo {    char name[8];    int bits;    int planar;    enum AVSampleFormat altform; ///< planar<->packed alternative form} SampleFmtInfo; /** this table gives more information about formats */static const SampleFmtInfo sample_fmt_info[AV_SAMPLE_FMT_NB] = {    [AV_SAMPLE_FMT_U8]   = { .name =   "u8", .bits =  8, .planar = 0, .altform = AV_SAMPLE_FMT_U8P  },    [AV_SAMPLE_FMT_S16]  = { .name =  "s16", .bits = 16, .planar = 0, .altform = AV_SAMPLE_FMT_S16P },    [AV_SAMPLE_FMT_S32]  = { .name =  "s32", .bits = 32, .planar = 0, .altform = AV_SAMPLE_FMT_S32P },    [AV_SAMPLE_FMT_S64]  = { .name =  "s64", .bits = 64, .planar = 0, .altform = AV_SAMPLE_FMT_S64P },    [AV_SAMPLE_FMT_FLT]  = { .name =  "flt", .bits = 32, .planar = 0, .altform = AV_SAMPLE_FMT_FLTP },    [AV_SAMPLE_FMT_DBL]  = { .name =  "dbl", .bits = 64, .planar = 0, .altform = AV_SAMPLE_FMT_DBLP },    [AV_SAMPLE_FMT_U8P]  = { .name =  "u8p", .bits =  8, .planar = 1, .altform = AV_SAMPLE_FMT_U8   },    [AV_SAMPLE_FMT_S16P] = { .name = "s16p", .bits = 16, .planar = 1, .altform = AV_SAMPLE_FMT_S16  },    [AV_SAMPLE_FMT_S32P] = { .name = "s32p", .bits = 32, .planar = 1, .altform = AV_SAMPLE_FMT_S32  },    [AV_SAMPLE_FMT_S64P] = { .name = "s64p", .bits = 64, .planar = 1, .altform = AV_SAMPLE_FMT_S64  },    [AV_SAMPLE_FMT_FLTP] = { .name = "fltp", .bits = 32, .planar = 1, .altform = AV_SAMPLE_FMT_FLT  },    [AV_SAMPLE_FMT_DBLP] = { .name = "dblp", .bits = 64, .planar = 1, .altform = AV_SAMPLE_FMT_DBL  },}; const char *av_get_sample_fmt_name(enum AVSampleFormat sample_fmt){    if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB)        return NULL;    return sample_fmt_info[sample_fmt].name;} enum AVSampleFormat av_get_sample_fmt(const char *name){    int i;     for (i = 0; i < AV_SAMPLE_FMT_NB; i++)        if (!strcmp(sample_fmt_info[i].name, name))            return i;    return AV_SAMPLE_FMT_NONE;} enum AVSampleFormat av_get_alt_sample_fmt(enum AVSampleFormat sample_fmt, int planar){    if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB)        return AV_SAMPLE_FMT_NONE;    if (sample_fmt_info[sample_fmt].planar == planar)        return sample_fmt;    return sample_fmt_info[sample_fmt].altform;} enum AVSampleFormat av_get_packed_sample_fmt(enum AVSampleFormat sample_fmt){    if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB)        return AV_SAMPLE_FMT_NONE;    if (sample_fmt_info[sample_fmt].planar)        return sample_fmt_info[sample_fmt].altform;    return sample_fmt;} enum AVSampleFormat av_get_planar_sample_fmt(enum AVSampleFormat sample_fmt){    if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB)        return AV_SAMPLE_FMT_NONE;    if (sample_fmt_info[sample_fmt].planar)        return sample_fmt;    return sample_fmt_info[sample_fmt].altform;} char *av_get_sample_fmt_string (char *buf, int buf_size, enum AVSampleFormat sample_fmt){    /* print header */    if (sample_fmt < 0)        snprintf(buf, buf_size, "name  " " depth");    else if (sample_fmt < AV_SAMPLE_FMT_NB) {        SampleFmtInfo info = sample_fmt_info[sample_fmt];        snprintf (buf, buf_size, "%-6s" "   %2d ", info.name, info.bits);    }     return buf;} int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt){     return sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB ?        0 : sample_fmt_info[sample_fmt].bits >> 3;} int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt){     if (sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB)         return 0;     return sample_fmt_info[sample_fmt].planar;} int av_samples_get_buffer_size(int *linesize, int nb_channels, int nb_samples,                               enum AVSampleFormat sample_fmt, int align){    int line_size;    int sample_size = av_get_bytes_per_sample(sample_fmt);    int planar      = av_sample_fmt_is_planar(sample_fmt);     /* validate parameter ranges */    if (!sample_size || nb_samples <= 0 || nb_channels <= 0)        return AVERROR(EINVAL);     /* auto-select alignment if not specified */    if (!align) {        if (nb_samples > INT_MAX - 31)            return AVERROR(EINVAL);        align = 1;        nb_samples = FFALIGN(nb_samples, 32);    }     /* check for integer overflow */    if (nb_channels > INT_MAX / align ||        (int64_t)nb_channels * nb_samples > (INT_MAX - (align * nb_channels)) / sample_size)        return AVERROR(EINVAL);     line_size = planar ? FFALIGN(nb_samples * sample_size,               align) :                         FFALIGN(nb_samples * sample_size * nb_channels, align);    if (linesize)        *linesize = line_size;     return planar ? line_size * nb_channels : line_size;} 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){    int ch, planar, buf_size, line_size;     planar   = av_sample_fmt_is_planar(sample_fmt);    buf_size = av_samples_get_buffer_size(&line_size, nb_channels, nb_samples,                                          sample_fmt, align);    if (buf_size < 0)        return buf_size;     audio_data[0] = (uint8_t *)buf;    for (ch = 1; planar && ch < nb_channels; ch++)        audio_data[ch] = audio_data[ch-1] + line_size;     if (linesize)        *linesize = line_size;     return buf_size;} int av_samples_alloc(uint8_t **audio_data, int *linesize, int nb_channels,                     int nb_samples, enum AVSampleFormat sample_fmt, int align){    uint8_t *buf;    int size = av_samples_get_buffer_size(NULL, nb_channels, nb_samples,                                          sample_fmt, align);    if (size < 0)        return size;     buf = av_malloc(size);    if (!buf)        return AVERROR(ENOMEM);     size = av_samples_fill_arrays(audio_data, linesize, buf, nb_channels,                                  nb_samples, sample_fmt, align);    if (size < 0) {        av_free(buf);        return size;    }     av_samples_set_silence(audio_data, 0, nb_samples, nb_channels, sample_fmt);     return size;} 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){    int ret, nb_planes = av_sample_fmt_is_planar(sample_fmt) ? nb_channels : 1;     *audio_data = av_calloc(nb_planes, sizeof(**audio_data));    if (!*audio_data)        return AVERROR(ENOMEM);    ret = av_samples_alloc(*audio_data, linesize, nb_channels,                           nb_samples, sample_fmt, align);    if (ret < 0)        av_freep(audio_data);    return ret;} 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){    int planar      = av_sample_fmt_is_planar(sample_fmt);    int planes      = planar ? nb_channels : 1;    int block_align = av_get_bytes_per_sample(sample_fmt) * (planar ? 1 : nb_channels);    int data_size   = nb_samples * block_align;    int i;     dst_offset *= block_align;    src_offset *= block_align;     if((dst[0] < src[0] ? src[0] - dst[0] : dst[0] - src[0]) >= data_size) {        for (i = 0; i < planes; i++)            memcpy(dst[i] + dst_offset, src[i] + src_offset, data_size);    } else {        for (i = 0; i < planes; i++)            memmove(dst[i] + dst_offset, src[i] + src_offset, data_size);    }     return 0;} int av_samples_set_silence(uint8_t **audio_data, int offset, int nb_samples,                           int nb_channels, enum AVSampleFormat sample_fmt){    int planar      = av_sample_fmt_is_planar(sample_fmt);    int planes      = planar ? nb_channels : 1;    int block_align = av_get_bytes_per_sample(sample_fmt) * (planar ? 1 : nb_channels);    int data_size   = nb_samples * block_align;    int fill_char   = (sample_fmt == AV_SAMPLE_FMT_U8 ||                     sample_fmt == AV_SAMPLE_FMT_U8P) ? 0x80 : 0x00;    int i;     offset *= block_align;     for (i = 0; i < planes; i++)        memset(audio_data[i] + offset, fill_char, data_size);     return 0;}