mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
3c8bff0740
Signed-off-by: Anton Khirnov <anton@khirnov.net>
479 lines
14 KiB
C
479 lines
14 KiB
C
/*
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "channel_layout.h"
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#include "buffer.h"
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#include "common.h"
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#include "dict.h"
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#include "frame.h"
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#include "imgutils.h"
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#include "mem.h"
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#include "samplefmt.h"
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static void get_frame_defaults(AVFrame *frame)
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{
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if (frame->extended_data != frame->data)
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av_freep(&frame->extended_data);
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memset(frame, 0, sizeof(*frame));
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frame->pts = AV_NOPTS_VALUE;
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frame->key_frame = 1;
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frame->sample_aspect_ratio = (AVRational){ 0, 1 };
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frame->format = -1; /* unknown */
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frame->extended_data = frame->data;
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}
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AVFrame *av_frame_alloc(void)
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{
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AVFrame *frame = av_mallocz(sizeof(*frame));
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if (!frame)
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return NULL;
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get_frame_defaults(frame);
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return frame;
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}
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void av_frame_free(AVFrame **frame)
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{
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if (!frame || !*frame)
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return;
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av_frame_unref(*frame);
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av_freep(frame);
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}
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static int get_video_buffer(AVFrame *frame, int align)
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{
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const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(frame->format);
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int ret, i;
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if (!desc)
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return AVERROR(EINVAL);
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if ((ret = av_image_check_size(frame->width, frame->height, 0, NULL)) < 0)
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return ret;
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if (!frame->linesize[0]) {
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ret = av_image_fill_linesizes(frame->linesize, frame->format,
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frame->width);
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if (ret < 0)
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return ret;
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for (i = 0; i < 4 && frame->linesize[i]; i++)
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frame->linesize[i] = FFALIGN(frame->linesize[i], align);
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}
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for (i = 0; i < 4 && frame->linesize[i]; i++) {
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int h = frame->height;
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if (i == 1 || i == 2)
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h = -((-h) >> desc->log2_chroma_h);
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frame->buf[i] = av_buffer_alloc(frame->linesize[i] * h);
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if (!frame->buf[i])
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goto fail;
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frame->data[i] = frame->buf[i]->data;
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}
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if (desc->flags & AV_PIX_FMT_FLAG_PAL || desc->flags & AV_PIX_FMT_FLAG_PSEUDOPAL) {
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av_buffer_unref(&frame->buf[1]);
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frame->buf[1] = av_buffer_alloc(1024);
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if (!frame->buf[1])
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goto fail;
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frame->data[1] = frame->buf[1]->data;
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}
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frame->extended_data = frame->data;
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return 0;
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fail:
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av_frame_unref(frame);
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return AVERROR(ENOMEM);
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}
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static int get_audio_buffer(AVFrame *frame, int align)
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{
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int channels = av_get_channel_layout_nb_channels(frame->channel_layout);
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int planar = av_sample_fmt_is_planar(frame->format);
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int planes = planar ? channels : 1;
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int ret, i;
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if (!frame->linesize[0]) {
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ret = av_samples_get_buffer_size(&frame->linesize[0], channels,
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frame->nb_samples, frame->format,
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align);
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if (ret < 0)
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return ret;
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}
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if (planes > AV_NUM_DATA_POINTERS) {
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frame->extended_data = av_mallocz(planes *
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sizeof(*frame->extended_data));
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frame->extended_buf = av_mallocz((planes - AV_NUM_DATA_POINTERS) *
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sizeof(*frame->extended_buf));
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if (!frame->extended_data || !frame->extended_buf) {
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av_freep(&frame->extended_data);
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av_freep(&frame->extended_buf);
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return AVERROR(ENOMEM);
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}
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frame->nb_extended_buf = planes - AV_NUM_DATA_POINTERS;
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} else
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frame->extended_data = frame->data;
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for (i = 0; i < FFMIN(planes, AV_NUM_DATA_POINTERS); i++) {
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frame->buf[i] = av_buffer_alloc(frame->linesize[0]);
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if (!frame->buf[i]) {
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av_frame_unref(frame);
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return AVERROR(ENOMEM);
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}
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frame->extended_data[i] = frame->data[i] = frame->buf[i]->data;
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}
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for (i = 0; i < planes - AV_NUM_DATA_POINTERS; i++) {
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frame->extended_buf[i] = av_buffer_alloc(frame->linesize[0]);
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if (!frame->extended_buf[i]) {
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av_frame_unref(frame);
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return AVERROR(ENOMEM);
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}
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frame->extended_data[i + AV_NUM_DATA_POINTERS] = frame->extended_buf[i]->data;
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}
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return 0;
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}
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int av_frame_get_buffer(AVFrame *frame, int align)
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{
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if (frame->format < 0)
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return AVERROR(EINVAL);
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if (frame->width > 0 && frame->height > 0)
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return get_video_buffer(frame, align);
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else if (frame->nb_samples > 0 && frame->channel_layout)
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return get_audio_buffer(frame, align);
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return AVERROR(EINVAL);
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}
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int av_frame_ref(AVFrame *dst, AVFrame *src)
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{
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int i, ret = 0;
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dst->format = src->format;
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dst->width = src->width;
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dst->height = src->height;
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dst->channel_layout = src->channel_layout;
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dst->nb_samples = src->nb_samples;
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ret = av_frame_copy_props(dst, src);
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if (ret < 0)
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return ret;
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/* duplicate the frame data if it's not refcounted */
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if (!src->buf[0]) {
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ret = av_frame_get_buffer(dst, 32);
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if (ret < 0)
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return ret;
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if (src->nb_samples) {
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int ch = av_get_channel_layout_nb_channels(src->channel_layout);
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av_samples_copy(dst->extended_data, src->extended_data, 0, 0,
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dst->nb_samples, ch, dst->format);
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} else {
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av_image_copy(dst->data, dst->linesize, src->data, src->linesize,
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dst->format, dst->width, dst->height);
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}
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return 0;
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}
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/* ref the buffers */
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for (i = 0; i < FF_ARRAY_ELEMS(src->buf) && src->buf[i]; i++) {
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dst->buf[i] = av_buffer_ref(src->buf[i]);
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if (!dst->buf[i]) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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}
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if (src->extended_buf) {
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dst->extended_buf = av_mallocz(sizeof(*dst->extended_buf) *
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src->nb_extended_buf);
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if (!dst->extended_buf) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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dst->nb_extended_buf = src->nb_extended_buf;
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for (i = 0; i < src->nb_extended_buf; i++) {
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dst->extended_buf[i] = av_buffer_ref(src->extended_buf[i]);
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if (!dst->extended_buf[i]) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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}
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}
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/* duplicate extended data */
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if (src->extended_data != src->data) {
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int ch = av_get_channel_layout_nb_channels(src->channel_layout);
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if (!ch) {
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ret = AVERROR(EINVAL);
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goto fail;
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}
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dst->extended_data = av_malloc(sizeof(*dst->extended_data) * ch);
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if (!dst->extended_data) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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memcpy(dst->extended_data, src->extended_data, sizeof(*src->extended_data) * ch);
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} else
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dst->extended_data = dst->data;
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memcpy(dst->data, src->data, sizeof(src->data));
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memcpy(dst->linesize, src->linesize, sizeof(src->linesize));
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return 0;
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fail:
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av_frame_unref(dst);
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return ret;
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}
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AVFrame *av_frame_clone(AVFrame *src)
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{
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AVFrame *ret = av_frame_alloc();
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if (!ret)
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return NULL;
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if (av_frame_ref(ret, src) < 0)
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av_frame_free(&ret);
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return ret;
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}
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void av_frame_unref(AVFrame *frame)
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{
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int i;
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for (i = 0; i < frame->nb_side_data; i++) {
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av_freep(&frame->side_data[i]->data);
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av_dict_free(&frame->side_data[i]->metadata);
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av_freep(&frame->side_data[i]);
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}
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av_freep(&frame->side_data);
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for (i = 0; i < FF_ARRAY_ELEMS(frame->buf); i++)
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av_buffer_unref(&frame->buf[i]);
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for (i = 0; i < frame->nb_extended_buf; i++)
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av_buffer_unref(&frame->extended_buf[i]);
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av_freep(&frame->extended_buf);
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get_frame_defaults(frame);
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}
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void av_frame_move_ref(AVFrame *dst, AVFrame *src)
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{
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*dst = *src;
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if (src->extended_data == src->data)
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dst->extended_data = dst->data;
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memset(src, 0, sizeof(*src));
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get_frame_defaults(src);
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}
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int av_frame_is_writable(AVFrame *frame)
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{
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int i, ret = 1;
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/* assume non-refcounted frames are not writable */
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if (!frame->buf[0])
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return 0;
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for (i = 0; i < FF_ARRAY_ELEMS(frame->buf) && frame->buf[i]; i++)
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ret &= !!av_buffer_is_writable(frame->buf[i]);
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for (i = 0; i < frame->nb_extended_buf; i++)
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ret &= !!av_buffer_is_writable(frame->extended_buf[i]);
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return ret;
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}
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int av_frame_make_writable(AVFrame *frame)
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{
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AVFrame tmp;
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int ret;
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if (!frame->buf[0])
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return AVERROR(EINVAL);
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if (av_frame_is_writable(frame))
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return 0;
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memset(&tmp, 0, sizeof(tmp));
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tmp.format = frame->format;
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tmp.width = frame->width;
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tmp.height = frame->height;
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tmp.channel_layout = frame->channel_layout;
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tmp.nb_samples = frame->nb_samples;
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ret = av_frame_get_buffer(&tmp, 32);
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if (ret < 0)
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return ret;
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if (tmp.nb_samples) {
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int ch = av_get_channel_layout_nb_channels(tmp.channel_layout);
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av_samples_copy(tmp.extended_data, frame->extended_data, 0, 0,
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frame->nb_samples, ch, frame->format);
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} else {
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av_image_copy(tmp.data, tmp.linesize, frame->data, frame->linesize,
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frame->format, frame->width, frame->height);
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}
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ret = av_frame_copy_props(&tmp, frame);
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if (ret < 0) {
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av_frame_unref(&tmp);
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return ret;
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}
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av_frame_unref(frame);
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*frame = tmp;
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if (tmp.data == tmp.extended_data)
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frame->extended_data = frame->data;
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return 0;
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}
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int av_frame_copy_props(AVFrame *dst, const AVFrame *src)
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{
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int i;
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dst->key_frame = src->key_frame;
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dst->pict_type = src->pict_type;
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dst->sample_aspect_ratio = src->sample_aspect_ratio;
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dst->pts = src->pts;
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dst->repeat_pict = src->repeat_pict;
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dst->interlaced_frame = src->interlaced_frame;
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dst->top_field_first = src->top_field_first;
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dst->palette_has_changed = src->palette_has_changed;
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dst->sample_rate = src->sample_rate;
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dst->opaque = src->opaque;
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dst->pkt_pts = src->pkt_pts;
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dst->pkt_dts = src->pkt_dts;
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dst->reordered_opaque = src->reordered_opaque;
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dst->quality = src->quality;
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dst->coded_picture_number = src->coded_picture_number;
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dst->display_picture_number = src->display_picture_number;
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memcpy(dst->error, src->error, sizeof(dst->error));
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for (i = 0; i < src->nb_side_data; i++) {
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const AVFrameSideData *sd_src = src->side_data[i];
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AVFrameSideData *sd_dst = av_frame_new_side_data(dst, sd_src->type,
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sd_src->size);
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if (!sd_dst) {
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for (i = 0; i < dst->nb_side_data; i++) {
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av_freep(&dst->side_data[i]->data);
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av_freep(&dst->side_data[i]);
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av_dict_free(&dst->side_data[i]->metadata);
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}
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av_freep(&dst->side_data);
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return AVERROR(ENOMEM);
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}
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memcpy(sd_dst->data, sd_src->data, sd_src->size);
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av_dict_copy(&sd_dst->metadata, sd_src->metadata, 0);
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}
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return 0;
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}
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AVBufferRef *av_frame_get_plane_buffer(AVFrame *frame, int plane)
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{
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uint8_t *data;
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int planes, i;
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if (frame->nb_samples) {
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int channels = av_get_channel_layout_nb_channels(frame->channel_layout);
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if (!channels)
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return NULL;
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planes = av_sample_fmt_is_planar(frame->format) ? channels : 1;
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} else
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planes = 4;
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if (plane < 0 || plane >= planes || !frame->extended_data[plane])
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return NULL;
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data = frame->extended_data[plane];
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for (i = 0; i < FF_ARRAY_ELEMS(frame->buf) && frame->buf[i]; i++) {
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AVBufferRef *buf = frame->buf[i];
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if (data >= buf->data && data < buf->data + buf->size)
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return buf;
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}
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for (i = 0; i < frame->nb_extended_buf; i++) {
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AVBufferRef *buf = frame->extended_buf[i];
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if (data >= buf->data && data < buf->data + buf->size)
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return buf;
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}
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return NULL;
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}
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AVFrameSideData *av_frame_new_side_data(AVFrame *frame,
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enum AVFrameSideDataType type,
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int size)
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{
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AVFrameSideData *ret, **tmp;
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if (frame->nb_side_data > INT_MAX / sizeof(*frame->side_data) - 1)
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return NULL;
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tmp = av_realloc(frame->side_data,
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(frame->nb_side_data + 1) * sizeof(*frame->side_data));
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if (!tmp)
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return NULL;
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frame->side_data = tmp;
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ret = av_mallocz(sizeof(*ret));
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if (!ret)
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return NULL;
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ret->data = av_malloc(size);
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if (!ret->data) {
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av_freep(&ret);
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return NULL;
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}
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ret->size = size;
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ret->type = type;
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frame->side_data[frame->nb_side_data++] = ret;
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return ret;
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}
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AVFrameSideData *av_frame_get_side_data(const AVFrame *frame,
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enum AVFrameSideDataType type)
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{
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int i;
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for (i = 0; i < frame->nb_side_data; i++) {
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if (frame->side_data[i]->type == type)
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return frame->side_data[i];
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}
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return NULL;
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}
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