2 * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
4 * This file is part of Libav.
6 * Libav is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * Libav is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with Libav; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libavutil/mem.h"
25 #include "audio_data.h"
27 static const AVClass audio_data_class = {
28 .class_name = "AudioData",
29 .item_name = av_default_item_name,
30 .version = LIBAVUTIL_VERSION_INT,
34 * Calculate alignment for data pointers.
36 static void calc_ptr_alignment(AudioData *a)
41 for (p = 0; p < a->planes; p++) {
43 while ((intptr_t)a->data[p] % cur_align)
45 if (cur_align < min_align)
46 min_align = cur_align;
48 a->ptr_align = min_align;
51 int ff_sample_fmt_is_planar(enum AVSampleFormat sample_fmt, int channels)
56 return av_sample_fmt_is_planar(sample_fmt);
59 int ff_audio_data_set_channels(AudioData *a, int channels)
61 if (channels < 1 || channels > AVRESAMPLE_MAX_CHANNELS ||
62 channels > a->allocated_channels)
63 return AVERROR(EINVAL);
65 a->channels = channels;
66 a->planes = a->is_planar ? channels : 1;
68 calc_ptr_alignment(a);
73 int ff_audio_data_init(AudioData *a, uint8_t **src, int plane_size, int channels,
74 int nb_samples, enum AVSampleFormat sample_fmt,
75 int read_only, const char *name)
79 memset(a, 0, sizeof(*a));
80 a->class = &audio_data_class;
82 if (channels < 1 || channels > AVRESAMPLE_MAX_CHANNELS) {
83 av_log(a, AV_LOG_ERROR, "invalid channel count: %d\n", channels);
84 return AVERROR(EINVAL);
87 a->sample_size = av_get_bytes_per_sample(sample_fmt);
88 if (!a->sample_size) {
89 av_log(a, AV_LOG_ERROR, "invalid sample format\n");
90 return AVERROR(EINVAL);
92 a->is_planar = ff_sample_fmt_is_planar(sample_fmt, channels);
93 a->planes = a->is_planar ? channels : 1;
94 a->stride = a->sample_size * (a->is_planar ? 1 : channels);
96 for (p = 0; p < (a->is_planar ? channels : 1); p++) {
98 av_log(a, AV_LOG_ERROR, "invalid NULL pointer for src[%d]\n", p);
99 return AVERROR(EINVAL);
103 a->allocated_samples = nb_samples * !read_only;
104 a->nb_samples = nb_samples;
105 a->sample_fmt = sample_fmt;
106 a->channels = channels;
107 a->allocated_channels = channels;
108 a->read_only = read_only;
109 a->allow_realloc = 0;
110 a->name = name ? name : "{no name}";
112 calc_ptr_alignment(a);
113 a->samples_align = plane_size / a->stride;
118 AudioData *ff_audio_data_alloc(int channels, int nb_samples,
119 enum AVSampleFormat sample_fmt, const char *name)
124 if (channels < 1 || channels > AVRESAMPLE_MAX_CHANNELS)
127 a = av_mallocz(sizeof(*a));
131 a->sample_size = av_get_bytes_per_sample(sample_fmt);
132 if (!a->sample_size) {
136 a->is_planar = ff_sample_fmt_is_planar(sample_fmt, channels);
137 a->planes = a->is_planar ? channels : 1;
138 a->stride = a->sample_size * (a->is_planar ? 1 : channels);
140 a->class = &audio_data_class;
141 a->sample_fmt = sample_fmt;
142 a->channels = channels;
143 a->allocated_channels = channels;
145 a->allow_realloc = 1;
146 a->name = name ? name : "{no name}";
148 if (nb_samples > 0) {
149 ret = ff_audio_data_realloc(a, nb_samples);
156 calc_ptr_alignment(a);
161 int ff_audio_data_realloc(AudioData *a, int nb_samples)
163 int ret, new_buf_size, plane_size, p;
165 /* check if buffer is already large enough */
166 if (a->allocated_samples >= nb_samples)
169 /* validate that the output is not read-only and realloc is allowed */
170 if (a->read_only || !a->allow_realloc)
171 return AVERROR(EINVAL);
173 new_buf_size = av_samples_get_buffer_size(&plane_size,
174 a->allocated_channels, nb_samples,
176 if (new_buf_size < 0)
179 /* if there is already data in the buffer and the sample format is planar,
180 allocate a new buffer and copy the data, otherwise just realloc the
181 internal buffer and set new data pointers */
182 if (a->nb_samples > 0 && a->is_planar) {
183 uint8_t *new_data[AVRESAMPLE_MAX_CHANNELS] = { NULL };
185 ret = av_samples_alloc(new_data, &plane_size, a->allocated_channels,
186 nb_samples, a->sample_fmt, 0);
190 for (p = 0; p < a->planes; p++)
191 memcpy(new_data[p], a->data[p], a->nb_samples * a->stride);
193 av_freep(&a->buffer);
194 memcpy(a->data, new_data, sizeof(new_data));
195 a->buffer = a->data[0];
197 av_freep(&a->buffer);
198 a->buffer = av_malloc(new_buf_size);
200 return AVERROR(ENOMEM);
201 ret = av_samples_fill_arrays(a->data, &plane_size, a->buffer,
202 a->allocated_channels, nb_samples,
207 a->buffer_size = new_buf_size;
208 a->allocated_samples = nb_samples;
210 calc_ptr_alignment(a);
211 a->samples_align = plane_size / a->stride;
216 void ff_audio_data_free(AudioData **a)
220 av_free((*a)->buffer);
224 int ff_audio_data_copy(AudioData *dst, AudioData *src, ChannelMapInfo *map)
228 /* validate input/output compatibility */
229 if (dst->sample_fmt != src->sample_fmt || dst->channels < src->channels)
230 return AVERROR(EINVAL);
232 if (map && !src->is_planar) {
233 av_log(src, AV_LOG_ERROR, "cannot remap packed format during copy\n");
234 return AVERROR(EINVAL);
237 /* if the input is empty, just empty the output */
238 if (!src->nb_samples) {
243 /* reallocate output if necessary */
244 ret = ff_audio_data_realloc(dst, src->nb_samples);
251 for (p = 0; p < src->planes; p++) {
252 if (map->channel_map[p] >= 0)
253 memcpy(dst->data[p], src->data[map->channel_map[p]],
254 src->nb_samples * src->stride);
257 if (map->do_copy || map->do_zero) {
258 for (p = 0; p < src->planes; p++) {
259 if (map->channel_copy[p])
260 memcpy(dst->data[p], dst->data[map->channel_copy[p]],
261 src->nb_samples * src->stride);
262 else if (map->channel_zero[p])
263 av_samples_set_silence(&dst->data[p], 0, src->nb_samples,
268 for (p = 0; p < src->planes; p++)
269 memcpy(dst->data[p], src->data[p], src->nb_samples * src->stride);
272 dst->nb_samples = src->nb_samples;
277 int ff_audio_data_combine(AudioData *dst, int dst_offset, AudioData *src,
278 int src_offset, int nb_samples)
280 int ret, p, dst_offset2, dst_move_size;
282 /* validate input/output compatibility */
283 if (dst->sample_fmt != src->sample_fmt || dst->channels != src->channels) {
284 av_log(src, AV_LOG_ERROR, "sample format mismatch\n");
285 return AVERROR(EINVAL);
288 /* validate offsets are within the buffer bounds */
289 if (dst_offset < 0 || dst_offset > dst->nb_samples ||
290 src_offset < 0 || src_offset > src->nb_samples) {
291 av_log(src, AV_LOG_ERROR, "offset out-of-bounds: src=%d dst=%d\n",
292 src_offset, dst_offset);
293 return AVERROR(EINVAL);
296 /* check offsets and sizes to see if we can just do nothing and return */
297 if (nb_samples > src->nb_samples - src_offset)
298 nb_samples = src->nb_samples - src_offset;
302 /* validate that the output is not read-only */
303 if (dst->read_only) {
304 av_log(dst, AV_LOG_ERROR, "dst is read-only\n");
305 return AVERROR(EINVAL);
308 /* reallocate output if necessary */
309 ret = ff_audio_data_realloc(dst, dst->nb_samples + nb_samples);
311 av_log(dst, AV_LOG_ERROR, "error reallocating dst\n");
315 dst_offset2 = dst_offset + nb_samples;
316 dst_move_size = dst->nb_samples - dst_offset;
318 for (p = 0; p < src->planes; p++) {
319 if (dst_move_size > 0) {
320 memmove(dst->data[p] + dst_offset2 * dst->stride,
321 dst->data[p] + dst_offset * dst->stride,
322 dst_move_size * dst->stride);
324 memcpy(dst->data[p] + dst_offset * dst->stride,
325 src->data[p] + src_offset * src->stride,
326 nb_samples * src->stride);
328 dst->nb_samples += nb_samples;
333 void ff_audio_data_drain(AudioData *a, int nb_samples)
335 if (a->nb_samples <= nb_samples) {
336 /* drain the whole buffer */
340 int move_offset = a->stride * nb_samples;
341 int move_size = a->stride * (a->nb_samples - nb_samples);
343 for (p = 0; p < a->planes; p++)
344 memmove(a->data[p], a->data[p] + move_offset, move_size);
346 a->nb_samples -= nb_samples;
350 int ff_audio_data_add_to_fifo(AVAudioFifo *af, AudioData *a, int offset,
353 uint8_t *offset_data[AVRESAMPLE_MAX_CHANNELS];
356 if (offset >= a->nb_samples)
358 offset_size = offset * a->stride;
359 for (p = 0; p < a->planes; p++)
360 offset_data[p] = a->data[p] + offset_size;
362 return av_audio_fifo_write(af, (void **)offset_data, nb_samples);
365 int ff_audio_data_read_from_fifo(AVAudioFifo *af, AudioData *a, int nb_samples)
370 return AVERROR(EINVAL);
372 ret = ff_audio_data_realloc(a, nb_samples);
376 ret = av_audio_fifo_read(af, (void **)a->data, nb_samples);