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- /*
- * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
- *
- * 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 <stdint.h>
- #include <string.h>
-
- #include "libavutil/mem.h"
- #include "audio_data.h"
-
- static const AVClass audio_data_class = {
- .class_name = "AudioData",
- .item_name = av_default_item_name,
- .version = LIBAVUTIL_VERSION_INT,
- };
-
- /*
- * Calculate alignment for data pointers.
- */
- static void calc_ptr_alignment(AudioData *a)
- {
- int p;
- int min_align = 128;
-
- for (p = 0; p < a->planes; p++) {
- int cur_align = 128;
- while ((intptr_t)a->data[p] % cur_align)
- cur_align >>= 1;
- if (cur_align < min_align)
- min_align = cur_align;
- }
- a->ptr_align = min_align;
- }
-
- int ff_sample_fmt_is_planar(enum AVSampleFormat sample_fmt, int channels)
- {
- if (channels == 1)
- return 1;
- else
- return av_sample_fmt_is_planar(sample_fmt);
- }
-
- int ff_audio_data_set_channels(AudioData *a, int channels)
- {
- if (channels < 1 || channels > AVRESAMPLE_MAX_CHANNELS ||
- channels > a->allocated_channels)
- return AVERROR(EINVAL);
-
- a->channels = channels;
- a->planes = a->is_planar ? channels : 1;
-
- calc_ptr_alignment(a);
-
- return 0;
- }
-
- int ff_audio_data_init(AudioData *a, uint8_t * const *src, int plane_size,
- int channels, int nb_samples,
- enum AVSampleFormat sample_fmt, int read_only,
- const char *name)
- {
- int p;
-
- memset(a, 0, sizeof(*a));
- a->class = &audio_data_class;
-
- if (channels < 1 || channels > AVRESAMPLE_MAX_CHANNELS) {
- av_log(a, AV_LOG_ERROR, "invalid channel count: %d\n", channels);
- return AVERROR(EINVAL);
- }
-
- a->sample_size = av_get_bytes_per_sample(sample_fmt);
- if (!a->sample_size) {
- av_log(a, AV_LOG_ERROR, "invalid sample format\n");
- return AVERROR(EINVAL);
- }
- a->is_planar = ff_sample_fmt_is_planar(sample_fmt, channels);
- a->planes = a->is_planar ? channels : 1;
- a->stride = a->sample_size * (a->is_planar ? 1 : channels);
-
- for (p = 0; p < (a->is_planar ? channels : 1); p++) {
- if (!src[p]) {
- av_log(a, AV_LOG_ERROR, "invalid NULL pointer for src[%d]\n", p);
- return AVERROR(EINVAL);
- }
- a->data[p] = src[p];
- }
- a->allocated_samples = nb_samples * !read_only;
- a->nb_samples = nb_samples;
- a->sample_fmt = sample_fmt;
- a->channels = channels;
- a->allocated_channels = channels;
- a->read_only = read_only;
- a->allow_realloc = 0;
- a->name = name ? name : "{no name}";
-
- calc_ptr_alignment(a);
- a->samples_align = plane_size / a->stride;
-
- return 0;
- }
-
- AudioData *ff_audio_data_alloc(int channels, int nb_samples,
- enum AVSampleFormat sample_fmt, const char *name)
- {
- AudioData *a;
- int ret;
-
- if (channels < 1 || channels > AVRESAMPLE_MAX_CHANNELS)
- return NULL;
-
- a = av_mallocz(sizeof(*a));
- if (!a)
- return NULL;
-
- a->sample_size = av_get_bytes_per_sample(sample_fmt);
- if (!a->sample_size) {
- av_free(a);
- return NULL;
- }
- a->is_planar = ff_sample_fmt_is_planar(sample_fmt, channels);
- a->planes = a->is_planar ? channels : 1;
- a->stride = a->sample_size * (a->is_planar ? 1 : channels);
-
- a->class = &audio_data_class;
- a->sample_fmt = sample_fmt;
- a->channels = channels;
- a->allocated_channels = channels;
- a->read_only = 0;
- a->allow_realloc = 1;
- a->name = name ? name : "{no name}";
-
- if (nb_samples > 0) {
- ret = ff_audio_data_realloc(a, nb_samples);
- if (ret < 0) {
- av_free(a);
- return NULL;
- }
- return a;
- } else {
- calc_ptr_alignment(a);
- return a;
- }
- }
-
- int ff_audio_data_realloc(AudioData *a, int nb_samples)
- {
- int ret, new_buf_size, plane_size, p;
-
- /* check if buffer is already large enough */
- if (a->allocated_samples >= nb_samples)
- return 0;
-
- /* validate that the output is not read-only and realloc is allowed */
- if (a->read_only || !a->allow_realloc)
- return AVERROR(EINVAL);
-
- new_buf_size = av_samples_get_buffer_size(&plane_size,
- a->allocated_channels, nb_samples,
- a->sample_fmt, 0);
- if (new_buf_size < 0)
- return new_buf_size;
-
- /* if there is already data in the buffer and the sample format is planar,
- allocate a new buffer and copy the data, otherwise just realloc the
- internal buffer and set new data pointers */
- if (a->nb_samples > 0 && a->is_planar) {
- uint8_t *new_data[AVRESAMPLE_MAX_CHANNELS] = { NULL };
-
- ret = av_samples_alloc(new_data, &plane_size, a->allocated_channels,
- nb_samples, a->sample_fmt, 0);
- if (ret < 0)
- return ret;
-
- for (p = 0; p < a->planes; p++)
- memcpy(new_data[p], a->data[p], a->nb_samples * a->stride);
-
- av_freep(&a->buffer);
- memcpy(a->data, new_data, sizeof(new_data));
- a->buffer = a->data[0];
- } else {
- av_freep(&a->buffer);
- a->buffer = av_malloc(new_buf_size);
- if (!a->buffer)
- return AVERROR(ENOMEM);
- ret = av_samples_fill_arrays(a->data, &plane_size, a->buffer,
- a->allocated_channels, nb_samples,
- a->sample_fmt, 0);
- if (ret < 0)
- return ret;
- }
- a->buffer_size = new_buf_size;
- a->allocated_samples = nb_samples;
-
- calc_ptr_alignment(a);
- a->samples_align = plane_size / a->stride;
-
- return 0;
- }
-
- void ff_audio_data_free(AudioData **a)
- {
- if (!*a)
- return;
- av_free((*a)->buffer);
- av_freep(a);
- }
-
- int ff_audio_data_copy(AudioData *dst, AudioData *src, ChannelMapInfo *map)
- {
- int ret, p;
-
- /* validate input/output compatibility */
- if (dst->sample_fmt != src->sample_fmt || dst->channels < src->channels)
- return AVERROR(EINVAL);
-
- if (map && !src->is_planar) {
- av_log(src, AV_LOG_ERROR, "cannot remap packed format during copy\n");
- return AVERROR(EINVAL);
- }
-
- /* if the input is empty, just empty the output */
- if (!src->nb_samples) {
- dst->nb_samples = 0;
- return 0;
- }
-
- /* reallocate output if necessary */
- ret = ff_audio_data_realloc(dst, src->nb_samples);
- if (ret < 0)
- return ret;
-
- /* copy data */
- if (map) {
- if (map->do_remap) {
- for (p = 0; p < src->planes; p++) {
- if (map->channel_map[p] >= 0)
- memcpy(dst->data[p], src->data[map->channel_map[p]],
- src->nb_samples * src->stride);
- }
- }
- if (map->do_copy || map->do_zero) {
- for (p = 0; p < src->planes; p++) {
- if (map->channel_copy[p])
- memcpy(dst->data[p], dst->data[map->channel_copy[p]],
- src->nb_samples * src->stride);
- else if (map->channel_zero[p])
- av_samples_set_silence(&dst->data[p], 0, src->nb_samples,
- 1, dst->sample_fmt);
- }
- }
- } else {
- for (p = 0; p < src->planes; p++)
- memcpy(dst->data[p], src->data[p], src->nb_samples * src->stride);
- }
-
- dst->nb_samples = src->nb_samples;
-
- return 0;
- }
-
- int ff_audio_data_combine(AudioData *dst, int dst_offset, AudioData *src,
- int src_offset, int nb_samples)
- {
- int ret, p, dst_offset2, dst_move_size;
-
- /* validate input/output compatibility */
- if (dst->sample_fmt != src->sample_fmt || dst->channels != src->channels) {
- av_log(src, AV_LOG_ERROR, "sample format mismatch\n");
- return AVERROR(EINVAL);
- }
-
- /* validate offsets are within the buffer bounds */
- if (dst_offset < 0 || dst_offset > dst->nb_samples ||
- src_offset < 0 || src_offset > src->nb_samples) {
- av_log(src, AV_LOG_ERROR, "offset out-of-bounds: src=%d dst=%d\n",
- src_offset, dst_offset);
- return AVERROR(EINVAL);
- }
-
- /* check offsets and sizes to see if we can just do nothing and return */
- if (nb_samples > src->nb_samples - src_offset)
- nb_samples = src->nb_samples - src_offset;
- if (nb_samples <= 0)
- return 0;
-
- /* validate that the output is not read-only */
- if (dst->read_only) {
- av_log(dst, AV_LOG_ERROR, "dst is read-only\n");
- return AVERROR(EINVAL);
- }
-
- /* reallocate output if necessary */
- ret = ff_audio_data_realloc(dst, dst->nb_samples + nb_samples);
- if (ret < 0) {
- av_log(dst, AV_LOG_ERROR, "error reallocating dst\n");
- return ret;
- }
-
- dst_offset2 = dst_offset + nb_samples;
- dst_move_size = dst->nb_samples - dst_offset;
-
- for (p = 0; p < src->planes; p++) {
- if (dst_move_size > 0) {
- memmove(dst->data[p] + dst_offset2 * dst->stride,
- dst->data[p] + dst_offset * dst->stride,
- dst_move_size * dst->stride);
- }
- memcpy(dst->data[p] + dst_offset * dst->stride,
- src->data[p] + src_offset * src->stride,
- nb_samples * src->stride);
- }
- dst->nb_samples += nb_samples;
-
- return 0;
- }
-
- void ff_audio_data_drain(AudioData *a, int nb_samples)
- {
- if (a->nb_samples <= nb_samples) {
- /* drain the whole buffer */
- a->nb_samples = 0;
- } else {
- int p;
- int move_offset = a->stride * nb_samples;
- int move_size = a->stride * (a->nb_samples - nb_samples);
-
- for (p = 0; p < a->planes; p++)
- memmove(a->data[p], a->data[p] + move_offset, move_size);
-
- a->nb_samples -= nb_samples;
- }
- }
-
- int ff_audio_data_add_to_fifo(AVAudioFifo *af, AudioData *a, int offset,
- int nb_samples)
- {
- uint8_t *offset_data[AVRESAMPLE_MAX_CHANNELS];
- int offset_size, p;
-
- if (offset >= a->nb_samples)
- return 0;
- offset_size = offset * a->stride;
- for (p = 0; p < a->planes; p++)
- offset_data[p] = a->data[p] + offset_size;
-
- return av_audio_fifo_write(af, (void **)offset_data, nb_samples);
- }
-
- int ff_audio_data_read_from_fifo(AVAudioFifo *af, AudioData *a, int nb_samples)
- {
- int ret;
-
- if (a->read_only)
- return AVERROR(EINVAL);
-
- ret = ff_audio_data_realloc(a, nb_samples);
- if (ret < 0)
- return ret;
-
- ret = av_audio_fifo_read(af, (void **)a->data, nb_samples);
- if (ret >= 0)
- a->nb_samples = ret;
- return ret;
- }
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