[deb_ffmpeg.git] / ffmpeg / libavutil / samplefmt.c

/*
 * 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_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_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;
}
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* This file is part of FFmpeg.
	3	*
	4	* FFmpeg is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU Lesser General Public
	6	* License as published by the Free Software Foundation; either
	7	* version 2.1 of the License, or (at your option) any later version.
	8	*
	9	* FFmpeg is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	* Lesser General Public License for more details.
	13	*
	14	* You should have received a copy of the GNU Lesser General Public
	15	* License along with FFmpeg; if not, write to the Free Software
	16	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	17	*/
	18
	19	#include "common.h"
	20	#include "samplefmt.h"
	21
	22	#include <stdio.h>
	23	#include <stdlib.h>
	24	#include <string.h>
	25
	26	typedef struct SampleFmtInfo {
	27	char name[8];
	28	int bits;
	29	int planar;
	30	enum AVSampleFormat altform; ///< planar<->packed alternative form
	31	} SampleFmtInfo;
	32
	33	/** this table gives more information about formats */
	34	static const SampleFmtInfo sample_fmt_info[AV_SAMPLE_FMT_NB] = {
	35	[AV_SAMPLE_FMT_U8] = { .name = "u8", .bits = 8, .planar = 0, .altform = AV_SAMPLE_FMT_U8P },
	36	[AV_SAMPLE_FMT_S16] = { .name = "s16", .bits = 16, .planar = 0, .altform = AV_SAMPLE_FMT_S16P },
	37	[AV_SAMPLE_FMT_S32] = { .name = "s32", .bits = 32, .planar = 0, .altform = AV_SAMPLE_FMT_S32P },
	38	[AV_SAMPLE_FMT_FLT] = { .name = "flt", .bits = 32, .planar = 0, .altform = AV_SAMPLE_FMT_FLTP },
	39	[AV_SAMPLE_FMT_DBL] = { .name = "dbl", .bits = 64, .planar = 0, .altform = AV_SAMPLE_FMT_DBLP },
	40	[AV_SAMPLE_FMT_U8P] = { .name = "u8p", .bits = 8, .planar = 1, .altform = AV_SAMPLE_FMT_U8 },
	41	[AV_SAMPLE_FMT_S16P] = { .name = "s16p", .bits = 16, .planar = 1, .altform = AV_SAMPLE_FMT_S16 },
	42	[AV_SAMPLE_FMT_S32P] = { .name = "s32p", .bits = 32, .planar = 1, .altform = AV_SAMPLE_FMT_S32 },
	43	[AV_SAMPLE_FMT_FLTP] = { .name = "fltp", .bits = 32, .planar = 1, .altform = AV_SAMPLE_FMT_FLT },
	44	[AV_SAMPLE_FMT_DBLP] = { .name = "dblp", .bits = 64, .planar = 1, .altform = AV_SAMPLE_FMT_DBL },
	45	};
	46
	47	const char *av_get_sample_fmt_name(enum AVSampleFormat sample_fmt)
	48	{
	49	if (sample_fmt < 0 \|\| sample_fmt >= AV_SAMPLE_FMT_NB)
	50	return NULL;
	51	return sample_fmt_info[sample_fmt].name;
	52	}
	53
	54	enum AVSampleFormat av_get_sample_fmt(const char *name)
	55	{
	56	int i;
	57
	58	for (i = 0; i < AV_SAMPLE_FMT_NB; i++)
	59	if (!strcmp(sample_fmt_info[i].name, name))
	60	return i;
	61	return AV_SAMPLE_FMT_NONE;
	62	}
	63
	64	enum AVSampleFormat av_get_alt_sample_fmt(enum AVSampleFormat sample_fmt, int planar)
65	{
66	if (sample_fmt < 0 \|\| sample_fmt >= AV_SAMPLE_FMT_NB)
67	return AV_SAMPLE_FMT_NONE;
68	if (sample_fmt_info[sample_fmt].planar == planar)
69	return sample_fmt;
70	return sample_fmt_info[sample_fmt].altform;
71	}
72
73	enum AVSampleFormat av_get_packed_sample_fmt(enum AVSampleFormat sample_fmt)
74	{
75	if (sample_fmt < 0 \|\| sample_fmt >= AV_SAMPLE_FMT_NB)
76	return AV_SAMPLE_FMT_NONE;
77	if (sample_fmt_info[sample_fmt].planar)
78	return sample_fmt_info[sample_fmt].altform;
79	return sample_fmt;
80	}
81
82	enum AVSampleFormat av_get_planar_sample_fmt(enum AVSampleFormat sample_fmt)
83	{
84	if (sample_fmt < 0 \|\| sample_fmt >= AV_SAMPLE_FMT_NB)
85	return AV_SAMPLE_FMT_NONE;
86	if (sample_fmt_info[sample_fmt].planar)
87	return sample_fmt;
88	return sample_fmt_info[sample_fmt].altform;
89	}
90
91	char av_get_sample_fmt_string (char buf, int buf_size, enum AVSampleFormat sample_fmt)
92	{
93	/* print header */
94	if (sample_fmt < 0)
95	snprintf(buf, buf_size, "name " " depth");
96	else if (sample_fmt < AV_SAMPLE_FMT_NB) {
97	SampleFmtInfo info = sample_fmt_info[sample_fmt];
98	snprintf (buf, buf_size, "%-6s" " %2d ", info.name, info.bits);
99	}
100
101	return buf;
102	}
103
104	int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt)
105	{
106	return sample_fmt < 0 \|\| sample_fmt >= AV_SAMPLE_FMT_NB ?
107	0 : sample_fmt_info[sample_fmt].bits >> 3;
108	}
109
2ba45a60 DM	110	int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt)
	111	{
	112	if (sample_fmt < 0 \|\| sample_fmt >= AV_SAMPLE_FMT_NB)
	113	return 0;
	114	return sample_fmt_info[sample_fmt].planar;
	115	}
	116
	117	int av_samples_get_buffer_size(int *linesize, int nb_channels, int nb_samples,
	118	enum AVSampleFormat sample_fmt, int align)
	119	{
	120	int line_size;
	121	int sample_size = av_get_bytes_per_sample(sample_fmt);
	122	int planar = av_sample_fmt_is_planar(sample_fmt);
	123
	124	/* validate parameter ranges */
	125	if (!sample_size \|\| nb_samples <= 0 \|\| nb_channels <= 0)
	126	return AVERROR(EINVAL);
	127
	128	/* auto-select alignment if not specified */
	129	if (!align) {
	130	if (nb_samples > INT_MAX - 31)
	131	return AVERROR(EINVAL);
	132	align = 1;
	133	nb_samples = FFALIGN(nb_samples, 32);
	134	}
	135
	136	/* check for integer overflow */
	137	if (nb_channels > INT_MAX / align \|\|
	138	(int64_t)nb_channels * nb_samples > (INT_MAX - (align * nb_channels)) / sample_size)
	139	return AVERROR(EINVAL);
	140
	141	line_size = planar ? FFALIGN(nb_samples * sample_size, align) :
	142	FFALIGN(nb_samples * sample_size * nb_channels, align);
	143	if (linesize)
	144	*linesize = line_size;
	145
	146	return planar ? line_size * nb_channels : line_size;
	147	}
	148
	149	int av_samples_fill_arrays(uint8_t *audio_data, int linesize,
	150	const uint8_t *buf, int nb_channels, int nb_samples,
	151	enum AVSampleFormat sample_fmt, int align)
	152	{
	153	int ch, planar, buf_size, line_size;
	154
	155	planar = av_sample_fmt_is_planar(sample_fmt);
	156	buf_size = av_samples_get_buffer_size(&line_size, nb_channels, nb_samples,
	157	sample_fmt, align);
	158	if (buf_size < 0)
	159	return buf_size;
	160
	161	audio_data[0] = (uint8_t *)buf;
	162	for (ch = 1; planar && ch < nb_channels; ch++)
	163	audio_data[ch] = audio_data[ch-1] + line_size;
	164
	165	if (linesize)
	166	*linesize = line_size;
	167
2ba45a60	168	return buf_size;
2ba45a60 DM	169	}
	170
	171	int av_samples_alloc(uint8_t *audio_data, int linesize, int nb_channels,
	172	int nb_samples, enum AVSampleFormat sample_fmt, int align)
	173	{
	174	uint8_t *buf;
	175	int size = av_samples_get_buffer_size(NULL, nb_channels, nb_samples,
	176	sample_fmt, align);
	177	if (size < 0)
	178	return size;
	179
	180	buf = av_malloc(size);
	181	if (!buf)
	182	return AVERROR(ENOMEM);
	183
	184	size = av_samples_fill_arrays(audio_data, linesize, buf, nb_channels,
	185	nb_samples, sample_fmt, align);
	186	if (size < 0) {
	187	av_free(buf);
	188	return size;
	189	}
	190
	191	av_samples_set_silence(audio_data, 0, nb_samples, nb_channels, sample_fmt);
	192
2ba45a60	193	return size;
2ba45a60 DM	194	}
	195
	196	int av_samples_alloc_array_and_samples(uint8_t **audio_data, int linesize, int nb_channels,
	197	int nb_samples, enum AVSampleFormat sample_fmt, int align)
	198	{
	199	int ret, nb_planes = av_sample_fmt_is_planar(sample_fmt) ? nb_channels : 1;
	200
	201	audio_data = av_calloc(nb_planes, sizeof(*audio_data));
	202	if (!*audio_data)
	203	return AVERROR(ENOMEM);
	204	ret = av_samples_alloc(*audio_data, linesize, nb_channels,
	205	nb_samples, sample_fmt, align);
	206	if (ret < 0)
	207	av_freep(audio_data);
	208	return ret;
	209	}
	210
	211	int av_samples_copy(uint8_t *dst, uint8_t const *src, int dst_offset,
	212	int src_offset, int nb_samples, int nb_channels,
	213	enum AVSampleFormat sample_fmt)
	214	{
	215	int planar = av_sample_fmt_is_planar(sample_fmt);
	216	int planes = planar ? nb_channels : 1;
	217	int block_align = av_get_bytes_per_sample(sample_fmt) * (planar ? 1 : nb_channels);
	218	int data_size = nb_samples * block_align;
	219	int i;
	220
	221	dst_offset *= block_align;
	222	src_offset *= block_align;
	223
	224	if((dst[0] < src[0] ? src[0] - dst[0] : dst[0] - src[0]) >= data_size) {
	225	for (i = 0; i < planes; i++)
	226	memcpy(dst[i] + dst_offset, src[i] + src_offset, data_size);
	227	} else {
	228	for (i = 0; i < planes; i++)
	229	memmove(dst[i] + dst_offset, src[i] + src_offset, data_size);
	230	}
	231
	232	return 0;
	233	}
	234
	235	int av_samples_set_silence(uint8_t **audio_data, int offset, int nb_samples,
	236	int nb_channels, enum AVSampleFormat sample_fmt)
	237	{
	238	int planar = av_sample_fmt_is_planar(sample_fmt);
	239	int planes = planar ? nb_channels : 1;
	240	int block_align = av_get_bytes_per_sample(sample_fmt) * (planar ? 1 : nb_channels);
	241	int data_size = nb_samples * block_align;
	242	int fill_char = (sample_fmt == AV_SAMPLE_FMT_U8 \|\|
	243	sample_fmt == AV_SAMPLE_FMT_U8P) ? 0x80 : 0x00;
	244	int i;
	245
	246	offset *= block_align;
	247
	248	for (i = 0; i < planes; i++)
	249	memset(audio_data[i] + offset, fill_char, data_size);
	250
	251	return 0;
	252	}