[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;
}

#if FF_API_GET_BITS_PER_SAMPLE_FMT
int av_get_bits_per_sample_fmt(enum AVSampleFormat sample_fmt)
{
    return sample_fmt < 0 || sample_fmt >= AV_SAMPLE_FMT_NB ?
        0 : sample_fmt_info[sample_fmt].bits;
}
#endif

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;

#if FF_API_SAMPLES_UTILS_RETURN_ZERO
    return 0;
#else
    return buf_size;
#endif
}

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);

#if FF_API_SAMPLES_UTILS_RETURN_ZERO
    return 0;
#else
    return size;
#endif
}

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
110	#if FF_API_GET_BITS_PER_SAMPLE_FMT
111	int av_get_bits_per_sample_fmt(enum AVSampleFormat sample_fmt)
112	{
113	return sample_fmt < 0 \|\| sample_fmt >= AV_SAMPLE_FMT_NB ?
114	0 : sample_fmt_info[sample_fmt].bits;
115	}
116	#endif
117
118	int av_sample_fmt_is_planar(enum AVSampleFormat sample_fmt)
119	{
120	if (sample_fmt < 0 \|\| sample_fmt >= AV_SAMPLE_FMT_NB)
121	return 0;
122	return sample_fmt_info[sample_fmt].planar;
123	}
124
125	int av_samples_get_buffer_size(int *linesize, int nb_channels, int nb_samples,
126	enum AVSampleFormat sample_fmt, int align)
127	{
128	int line_size;
129	int sample_size = av_get_bytes_per_sample(sample_fmt);
130	int planar = av_sample_fmt_is_planar(sample_fmt);
131
132	/* validate parameter ranges */
133	if (!sample_size \|\| nb_samples <= 0 \|\| nb_channels <= 0)
134	return AVERROR(EINVAL);
135
136	/* auto-select alignment if not specified */
137	if (!align) {
138	if (nb_samples > INT_MAX - 31)
139	return AVERROR(EINVAL);
140	align = 1;
141	nb_samples = FFALIGN(nb_samples, 32);
142	}
143
144	/* check for integer overflow */
145	if (nb_channels > INT_MAX / align \|\|
146	(int64_t)nb_channels * nb_samples > (INT_MAX - (align * nb_channels)) / sample_size)
147	return AVERROR(EINVAL);
148
149	line_size = planar ? FFALIGN(nb_samples * sample_size, align) :
150	FFALIGN(nb_samples * sample_size * nb_channels, align);
151	if (linesize)
152	*linesize = line_size;
153
154	return planar ? line_size * nb_channels : line_size;
155	}
156
157	int av_samples_fill_arrays(uint8_t *audio_data, int linesize,
158	const uint8_t *buf, int nb_channels, int nb_samples,
159	enum AVSampleFormat sample_fmt, int align)
160	{
161	int ch, planar, buf_size, line_size;
162
163	planar = av_sample_fmt_is_planar(sample_fmt);
164	buf_size = av_samples_get_buffer_size(&line_size, nb_channels, nb_samples,
165	sample_fmt, align);
166	if (buf_size < 0)
167	return buf_size;
168
169	audio_data[0] = (uint8_t *)buf;
170	for (ch = 1; planar && ch < nb_channels; ch++)
171	audio_data[ch] = audio_data[ch-1] + line_size;
172
173	if (linesize)
174	*linesize = line_size;
175
176	#if FF_API_SAMPLES_UTILS_RETURN_ZERO
177	return 0;
178	#else
179	return buf_size;
180	#endif
181	}
182
183	int av_samples_alloc(uint8_t *audio_data, int linesize, int nb_channels,
184	int nb_samples, enum AVSampleFormat sample_fmt, int align)
185	{
186	uint8_t *buf;
187	int size = av_samples_get_buffer_size(NULL, nb_channels, nb_samples,
188	sample_fmt, align);
189	if (size < 0)
190	return size;
191
192	buf = av_malloc(size);
193	if (!buf)
194	return AVERROR(ENOMEM);
195
196	size = av_samples_fill_arrays(audio_data, linesize, buf, nb_channels,
197	nb_samples, sample_fmt, align);
198	if (size < 0) {
199	av_free(buf);
200	return size;
201	}
202
203	av_samples_set_silence(audio_data, 0, nb_samples, nb_channels, sample_fmt);
204
205	#if FF_API_SAMPLES_UTILS_RETURN_ZERO
206	return 0;
207	#else
208	return size;
209	#endif
210	}
211
212	int av_samples_alloc_array_and_samples(uint8_t **audio_data, int linesize, int nb_channels,
213	int nb_samples, enum AVSampleFormat sample_fmt, int align)
214	{
215	int ret, nb_planes = av_sample_fmt_is_planar(sample_fmt) ? nb_channels : 1;
216
217	audio_data = av_calloc(nb_planes, sizeof(*audio_data));
218	if (!*audio_data)
219	return AVERROR(ENOMEM);
220	ret = av_samples_alloc(*audio_data, linesize, nb_channels,
221	nb_samples, sample_fmt, align);
222	if (ret < 0)
223	av_freep(audio_data);
224	return ret;
225	}
226
227	int av_samples_copy(uint8_t *dst, uint8_t const *src, int dst_offset,
228	int src_offset, int nb_samples, int nb_channels,
229	enum AVSampleFormat sample_fmt)
230	{
231	int planar = av_sample_fmt_is_planar(sample_fmt);
232	int planes = planar ? nb_channels : 1;
233	int block_align = av_get_bytes_per_sample(sample_fmt) * (planar ? 1 : nb_channels);
234	int data_size = nb_samples * block_align;
235	int i;
236
237	dst_offset *= block_align;
238	src_offset *= block_align;
239
240	if((dst[0] < src[0] ? src[0] - dst[0] : dst[0] - src[0]) >= data_size) {
241	for (i = 0; i < planes; i++)
242	memcpy(dst[i] + dst_offset, src[i] + src_offset, data_size);
243	} else {
244	for (i = 0; i < planes; i++)
245	memmove(dst[i] + dst_offset, src[i] + src_offset, data_size);
246	}
247
248	return 0;
249	}
250
251	int av_samples_set_silence(uint8_t **audio_data, int offset, int nb_samples,
252	int nb_channels, enum AVSampleFormat sample_fmt)
253	{
254	int planar = av_sample_fmt_is_planar(sample_fmt);
255	int planes = planar ? nb_channels : 1;
256	int block_align = av_get_bytes_per_sample(sample_fmt) * (planar ? 1 : nb_channels);
257	int data_size = nb_samples * block_align;
258	int fill_char = (sample_fmt == AV_SAMPLE_FMT_U8 \|\|
259	sample_fmt == AV_SAMPLE_FMT_U8P) ? 0x80 : 0x00;
260	int i;
261
262	offset *= block_align;
263
264	for (i = 0; i < planes; i++)
265	memset(audio_data[i] + offset, fill_char, data_size);
266
267	return 0;
268	}