mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
617 lines
19 KiB
C
617 lines
19 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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/**
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* @file
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* Audio join filter
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*
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* Join multiple audio inputs as different channels in
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* a single output
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*/
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#include "libavutil/avassert.h"
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#include "libavutil/avstring.h"
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#include "libavutil/channel_layout.h"
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#include "libavutil/common.h"
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#include "libavutil/opt.h"
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#include "audio.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "filters.h"
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#include "internal.h"
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typedef struct ChannelMap {
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int input; ///< input stream index
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int in_channel_idx; ///< index of in_channel in the input stream data
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enum AVChannel in_channel;
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enum AVChannel out_channel;
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} ChannelMap;
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typedef struct JoinContext {
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const AVClass *class;
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int inputs;
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char *map;
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AVChannelLayout ch_layout;
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int64_t eof_pts;
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int eof;
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ChannelMap *channels;
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/**
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* Temporary storage for input frames, until we get one on each input.
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*/
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AVFrame **input_frames;
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/**
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* Temporary storage for buffer references, for assembling the output frame.
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*/
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AVBufferRef **buffers;
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} JoinContext;
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#define OFFSET(x) offsetof(JoinContext, x)
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#define A AV_OPT_FLAG_AUDIO_PARAM
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#define F AV_OPT_FLAG_FILTERING_PARAM
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static const AVOption join_options[] = {
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{ "inputs", "Number of input streams.", OFFSET(inputs), AV_OPT_TYPE_INT, { .i64 = 2 }, 1, INT_MAX, A|F },
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{ "channel_layout", "Channel layout of the "
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"output stream.", OFFSET(ch_layout), AV_OPT_TYPE_CHLAYOUT, {.str = "stereo"}, 0, 0, A|F },
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{ "map", "A comma-separated list of channels maps in the format "
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"'input_stream.input_channel-output_channel.",
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OFFSET(map), AV_OPT_TYPE_STRING, .flags = A|F },
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{ NULL }
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};
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#define MAP_SEPARATOR '|'
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AVFILTER_DEFINE_CLASS(join);
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static int parse_maps(AVFilterContext *ctx)
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{
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JoinContext *s = ctx->priv;
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char *cur = s->map;
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while (cur && *cur) {
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ChannelMap *map;
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char *sep, *next, *p;
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int input_idx, out_ch_idx;
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next = strchr(cur, MAP_SEPARATOR);
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if (next)
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*next++ = 0;
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/* split the map into input and output parts */
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if (!(sep = strchr(cur, '-'))) {
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av_log(ctx, AV_LOG_ERROR, "Missing separator '-' in channel "
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"map '%s'\n", cur);
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return AVERROR(EINVAL);
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}
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*sep++ = 0;
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/* parse output channel */
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out_ch_idx = av_channel_layout_index_from_string(&s->ch_layout, sep);
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if (out_ch_idx < 0) {
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av_log(ctx, AV_LOG_ERROR, "Invalid output channel: %s.\n", sep);
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return AVERROR(EINVAL);
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}
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map = &s->channels[out_ch_idx];
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if (map->input >= 0) {
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av_log(ctx, AV_LOG_ERROR, "Multiple maps for output channel "
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"'%s'.\n", sep);
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return AVERROR(EINVAL);
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}
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/* parse input channel */
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input_idx = strtol(cur, &cur, 0);
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if (input_idx < 0 || input_idx >= s->inputs) {
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av_log(ctx, AV_LOG_ERROR, "Invalid input stream index: %d.\n",
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input_idx);
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return AVERROR(EINVAL);
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}
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if (*cur)
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cur++;
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map->input = input_idx;
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map->in_channel = AV_CHAN_NONE;
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map->in_channel_idx = strtol(cur, &p, 0);
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if (p == cur) {
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/* channel specifier is not a number, handle as channel name */
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map->in_channel = av_channel_from_string(cur);
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if (map->in_channel < 0) {
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av_log(ctx, AV_LOG_ERROR, "Invalid input channel: %s.\n", cur);
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return AVERROR(EINVAL);
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}
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} else if (map->in_channel_idx < 0) {
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av_log(ctx, AV_LOG_ERROR, "Invalid input channel index: %d\n", map->in_channel_idx);
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return AVERROR(EINVAL);
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}
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cur = next;
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}
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return 0;
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}
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static av_cold int join_init(AVFilterContext *ctx)
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{
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JoinContext *s = ctx->priv;
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int ret, i;
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s->channels = av_calloc(s->ch_layout.nb_channels, sizeof(*s->channels));
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s->buffers = av_calloc(s->ch_layout.nb_channels, sizeof(*s->buffers));
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s->input_frames = av_calloc(s->inputs, sizeof(*s->input_frames));
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if (!s->channels || !s->buffers|| !s->input_frames)
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return AVERROR(ENOMEM);
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for (i = 0; i < s->ch_layout.nb_channels; i++) {
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s->channels[i].out_channel = av_channel_layout_channel_from_index(&s->ch_layout, i);
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s->channels[i].input = -1;
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s->channels[i].in_channel_idx = -1;
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s->channels[i].in_channel = AV_CHAN_NONE;
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}
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if ((ret = parse_maps(ctx)) < 0)
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return ret;
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for (i = 0; i < s->inputs; i++) {
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AVFilterPad pad = { 0 };
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pad.type = AVMEDIA_TYPE_AUDIO;
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pad.name = av_asprintf("input%d", i);
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if (!pad.name)
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return AVERROR(ENOMEM);
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if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)
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return ret;
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}
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return 0;
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}
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static av_cold void join_uninit(AVFilterContext *ctx)
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{
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JoinContext *s = ctx->priv;
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int i;
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for (i = 0; i < s->inputs && s->input_frames; i++) {
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av_frame_free(&s->input_frames[i]);
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}
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av_freep(&s->channels);
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av_freep(&s->buffers);
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av_freep(&s->input_frames);
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}
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static int join_query_formats(AVFilterContext *ctx)
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{
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JoinContext *s = ctx->priv;
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AVFilterChannelLayouts *layouts = NULL;
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int i, ret;
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if ((ret = ff_add_channel_layout(&layouts, &s->ch_layout)) < 0 ||
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(ret = ff_channel_layouts_ref(layouts, &ctx->outputs[0]->incfg.channel_layouts)) < 0)
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return ret;
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for (i = 0; i < ctx->nb_inputs; i++) {
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layouts = ff_all_channel_layouts();
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if ((ret = ff_channel_layouts_ref(layouts, &ctx->inputs[i]->outcfg.channel_layouts)) < 0)
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return ret;
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}
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if ((ret = ff_set_common_formats(ctx, ff_planar_sample_fmts())) < 0 ||
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(ret = ff_set_common_all_samplerates(ctx)) < 0)
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return ret;
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return 0;
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}
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typedef struct ChannelList {
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enum AVChannel *ch;
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int nb_ch;
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} ChannelList;
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static enum AVChannel channel_list_pop(ChannelList *chl, int idx)
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{
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enum AVChannel ret = chl->ch[idx];
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memmove(chl->ch + idx, chl->ch + idx + 1,
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(chl->nb_ch - idx - 1) * sizeof(*chl->ch));
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chl->nb_ch--;
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return ret;
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}
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/*
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* If ch is present in chl, remove it from the list and return it.
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* Otherwise return AV_CHAN_NONE.
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*/
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static enum AVChannel channel_list_pop_ch(ChannelList *chl, enum AVChannel ch)
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{
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for (int i = 0; i < chl->nb_ch; i++)
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if (chl->ch[i] == ch)
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return channel_list_pop(chl, i);
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return AV_CHAN_NONE;
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}
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static void guess_map_matching(AVFilterContext *ctx, ChannelMap *ch,
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ChannelList *inputs)
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{
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int i;
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for (i = 0; i < ctx->nb_inputs; i++) {
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if (channel_list_pop_ch(&inputs[i], ch->out_channel) != AV_CHAN_NONE) {
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ch->input = i;
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ch->in_channel = ch->out_channel;
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return;
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}
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}
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}
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static void guess_map_any(AVFilterContext *ctx, ChannelMap *ch,
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ChannelList *inputs)
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{
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int i;
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for (i = 0; i < ctx->nb_inputs; i++) {
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if (inputs[i].nb_ch) {
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ch->input = i;
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ch->in_channel = channel_list_pop(&inputs[i], 0);
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return;
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}
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}
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}
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static int join_config_output(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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JoinContext *s = ctx->priv;
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// unused channels from each input
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ChannelList *inputs_unused;
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char inbuf[64], outbuf[64];
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int i, ret = 0;
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/* initialize unused channel list for each input */
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inputs_unused = av_calloc(ctx->nb_inputs, sizeof(*inputs_unused));
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if (!inputs_unused)
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return AVERROR(ENOMEM);
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for (i = 0; i < ctx->nb_inputs; i++) {
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AVFilterLink *inlink = ctx->inputs[i];
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AVChannelLayout *chl = &inlink->ch_layout;
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ChannelList *iu = &inputs_unused[i];
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iu->nb_ch = chl->nb_channels;
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iu->ch = av_malloc_array(iu->nb_ch, sizeof(*iu->ch));
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if (!iu->ch) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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for (int ch_idx = 0; ch_idx < iu->nb_ch; ch_idx++) {
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iu->ch[ch_idx] = av_channel_layout_channel_from_index(chl, ch_idx);
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if (iu->ch[ch_idx] < 0) {
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/* no channel ordering information in this input,
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* so don't auto-map from it */
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iu->nb_ch = 0;
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break;
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}
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}
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}
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/* process user-specified maps */
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for (i = 0; i < s->ch_layout.nb_channels; i++) {
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ChannelMap *ch = &s->channels[i];
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AVFilterLink *inlink;
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AVChannelLayout *ichl;
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ChannelList *iu;
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if (ch->input < 0)
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continue;
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inlink = ctx->inputs[ch->input];
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ichl = &inlink->ch_layout;
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iu = &inputs_unused[ch->input];
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/* get the index for the channels defined by name */
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if (ch->in_channel != AV_CHAN_NONE) {
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ch->in_channel_idx = av_channel_layout_index_from_channel(ichl, ch->in_channel);
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if (ch->in_channel_idx < 0) {
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av_channel_name(inbuf, sizeof(inbuf), ch->in_channel);
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av_log(ctx, AV_LOG_ERROR, "Requested channel %s is not present in "
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"input stream #%d.\n", inbuf,
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ch->input);
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ret = AVERROR(EINVAL);
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goto fail;
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}
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}
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/* make sure channels specified by index actually exist */
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if (ch->in_channel_idx >= ichl->nb_channels) {
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av_log(ctx, AV_LOG_ERROR, "Requested channel with index %d is not "
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"present in input stream #%d.\n", ch->in_channel_idx, ch->input);
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ret = AVERROR(EINVAL);
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goto fail;
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}
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channel_list_pop_ch(iu, av_channel_layout_channel_from_index(ichl, ch->in_channel_idx));
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}
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/* guess channel maps when not explicitly defined */
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/* first try unused matching channels */
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for (i = 0; i < s->ch_layout.nb_channels; i++) {
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ChannelMap *ch = &s->channels[i];
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if (ch->input < 0)
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guess_map_matching(ctx, ch, inputs_unused);
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}
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/* if the above failed, try to find _any_ unused input channel */
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for (i = 0; i < s->ch_layout.nb_channels; i++) {
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ChannelMap *ch = &s->channels[i];
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if (ch->input < 0)
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guess_map_any(ctx, ch, inputs_unused);
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if (ch->input < 0) {
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av_channel_name(outbuf, sizeof(outbuf), ch->out_channel);
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av_log(ctx, AV_LOG_ERROR, "Could not find input channel for "
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"output channel '%s'.\n",
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outbuf);
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ret = AVERROR(EINVAL);
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goto fail;
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}
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if (ch->in_channel != AV_CHAN_NONE) {
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ch->in_channel_idx = av_channel_layout_index_from_channel(
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&ctx->inputs[ch->input]->ch_layout, ch->in_channel);
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}
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av_assert0(ch->in_channel_idx >= 0);
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}
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/* print mappings */
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av_log(ctx, AV_LOG_VERBOSE, "mappings: ");
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for (i = 0; i < s->ch_layout.nb_channels; i++) {
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ChannelMap *ch = &s->channels[i];
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AVFilterLink *inlink = ctx->inputs[ch->input];
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AVChannelLayout *ichl = &inlink->ch_layout;
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enum AVChannel in_ch = av_channel_layout_channel_from_index(
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ichl, ch->in_channel_idx);
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av_channel_name(inbuf, sizeof(inbuf), in_ch);
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av_channel_name(outbuf, sizeof(outbuf), ch->out_channel);
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av_log(ctx, AV_LOG_VERBOSE, "%d.%s(%d) => %s(%d) ", ch->input,
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inbuf, ch->in_channel_idx,
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outbuf, i);
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}
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av_log(ctx, AV_LOG_VERBOSE, "\n");
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for (i = 0; i < ctx->nb_inputs; i++) {
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if (inputs_unused[i].nb_ch == ctx->inputs[i]->ch_layout.nb_channels)
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av_log(ctx, AV_LOG_WARNING, "No channels are used from input "
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"stream %d.\n", i);
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}
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fail:
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for (i = 0; i < ctx->nb_inputs; i++)
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av_freep(&inputs_unused[i].ch);
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av_freep(&inputs_unused);
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return ret;
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}
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static int try_push_frame(AVFilterContext *ctx)
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{
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AVFilterLink *outlink = ctx->outputs[0];
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JoinContext *s = ctx->priv;
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AVFrame *frame;
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int linesize = INT_MAX;
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int nb_samples = INT_MAX;
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int nb_buffers = 0;
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int i, j, ret;
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for (i = 0; i < ctx->nb_inputs; i++) {
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if (!s->input_frames[i]) {
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nb_samples = 0;
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break;
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} else {
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nb_samples = FFMIN(nb_samples, s->input_frames[i]->nb_samples);
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}
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}
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if (!nb_samples)
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goto eof;
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/* setup the output frame */
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frame = av_frame_alloc();
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if (!frame)
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return AVERROR(ENOMEM);
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if (s->ch_layout.nb_channels > FF_ARRAY_ELEMS(frame->data)) {
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frame->extended_data = av_calloc(s->ch_layout.nb_channels,
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sizeof(*frame->extended_data));
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if (!frame->extended_data) {
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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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/* copy the data pointers */
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for (i = 0; i < s->ch_layout.nb_channels; i++) {
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ChannelMap *ch = &s->channels[i];
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AVFrame *cur = s->input_frames[ch->input];
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AVBufferRef *buf;
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frame->extended_data[i] = cur->extended_data[ch->in_channel_idx];
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linesize = FFMIN(linesize, cur->linesize[0]);
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/* add the buffer where this plan is stored to the list if it's
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* not already there */
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buf = av_frame_get_plane_buffer(cur, ch->in_channel_idx);
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if (!buf) {
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ret = AVERROR(EINVAL);
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goto fail;
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}
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for (j = 0; j < nb_buffers; j++)
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if (s->buffers[j]->buffer == buf->buffer)
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break;
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if (j == i)
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s->buffers[nb_buffers++] = buf;
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}
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/* create references to the buffers we copied to output */
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if (nb_buffers > FF_ARRAY_ELEMS(frame->buf)) {
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frame->nb_extended_buf = nb_buffers - FF_ARRAY_ELEMS(frame->buf);
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frame->extended_buf = av_calloc(frame->nb_extended_buf,
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sizeof(*frame->extended_buf));
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if (!frame->extended_buf) {
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frame->nb_extended_buf = 0;
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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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for (i = 0; i < FFMIN(FF_ARRAY_ELEMS(frame->buf), nb_buffers); i++) {
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frame->buf[i] = av_buffer_ref(s->buffers[i]);
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if (!frame->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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for (i = 0; i < frame->nb_extended_buf; i++) {
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frame->extended_buf[i] = av_buffer_ref(s->buffers[i +
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FF_ARRAY_ELEMS(frame->buf)]);
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if (!frame->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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|
|
|
frame->nb_samples = nb_samples;
|
|
frame->duration = av_rescale_q(frame->nb_samples,
|
|
av_make_q(1, outlink->sample_rate),
|
|
outlink->time_base);
|
|
|
|
#if FF_API_OLD_CHANNEL_LAYOUT
|
|
FF_DISABLE_DEPRECATION_WARNINGS
|
|
frame->channel_layout = outlink->channel_layout;
|
|
frame->channels = outlink->ch_layout.nb_channels;
|
|
FF_ENABLE_DEPRECATION_WARNINGS
|
|
#endif
|
|
if ((ret = av_channel_layout_copy(&frame->ch_layout, &outlink->ch_layout)) < 0)
|
|
goto fail;
|
|
frame->sample_rate = outlink->sample_rate;
|
|
frame->format = outlink->format;
|
|
frame->pts = s->input_frames[0]->pts;
|
|
frame->linesize[0] = linesize;
|
|
if (frame->data != frame->extended_data) {
|
|
memcpy(frame->data, frame->extended_data, sizeof(*frame->data) *
|
|
FFMIN(FF_ARRAY_ELEMS(frame->data), s->ch_layout.nb_channels));
|
|
}
|
|
|
|
s->eof_pts = frame->pts + av_rescale_q(frame->nb_samples,
|
|
av_make_q(1, outlink->sample_rate),
|
|
outlink->time_base);
|
|
ret = ff_filter_frame(outlink, frame);
|
|
|
|
for (i = 0; i < ctx->nb_inputs; i++)
|
|
av_frame_free(&s->input_frames[i]);
|
|
|
|
return ret;
|
|
|
|
fail:
|
|
av_frame_free(&frame);
|
|
return ret;
|
|
eof:
|
|
for (i = 0; i < ctx->nb_inputs; i++) {
|
|
if (s->eof &&
|
|
ff_inlink_queued_samples(ctx->inputs[i]) <= 0 &&
|
|
!s->input_frames[i]) {
|
|
ff_outlink_set_status(outlink, AVERROR_EOF, s->eof_pts);
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int activate(AVFilterContext *ctx)
|
|
{
|
|
JoinContext *s = ctx->priv;
|
|
int i, ret, status;
|
|
int nb_samples = 0;
|
|
int64_t pts;
|
|
|
|
FF_FILTER_FORWARD_STATUS_BACK_ALL(ctx->outputs[0], ctx);
|
|
|
|
if (!s->input_frames[0]) {
|
|
ret = ff_inlink_consume_frame(ctx->inputs[0], &s->input_frames[0]);
|
|
if (ret < 0) {
|
|
return ret;
|
|
} else if (ret == 0 && ff_inlink_acknowledge_status(ctx->inputs[0], &status, &pts)) {
|
|
s->eof |= status == AVERROR_EOF;
|
|
}
|
|
|
|
if (!s->eof && !s->input_frames[0] && ff_outlink_frame_wanted(ctx->outputs[0])) {
|
|
ff_inlink_request_frame(ctx->inputs[0]);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (s->input_frames[0])
|
|
nb_samples = s->input_frames[0]->nb_samples;
|
|
|
|
for (i = 1; i < ctx->nb_inputs && nb_samples > 0; i++) {
|
|
if (s->input_frames[i])
|
|
continue;
|
|
ret = ff_inlink_consume_samples(ctx->inputs[i], nb_samples, nb_samples, &s->input_frames[i]);
|
|
if (ret < 0) {
|
|
return ret;
|
|
} else if (ff_inlink_acknowledge_status(ctx->inputs[i], &status, &pts)) {
|
|
s->eof |= status == AVERROR_EOF;
|
|
}
|
|
|
|
if (!s->eof && !s->input_frames[i]) {
|
|
ff_inlink_request_frame(ctx->inputs[i]);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return try_push_frame(ctx);
|
|
}
|
|
|
|
static const AVFilterPad avfilter_af_join_outputs[] = {
|
|
{
|
|
.name = "default",
|
|
.type = AVMEDIA_TYPE_AUDIO,
|
|
.config_props = join_config_output,
|
|
},
|
|
};
|
|
|
|
const AVFilter ff_af_join = {
|
|
.name = "join",
|
|
.description = NULL_IF_CONFIG_SMALL("Join multiple audio streams into "
|
|
"multi-channel output."),
|
|
.priv_size = sizeof(JoinContext),
|
|
.priv_class = &join_class,
|
|
.init = join_init,
|
|
.uninit = join_uninit,
|
|
.activate = activate,
|
|
.inputs = NULL,
|
|
FILTER_OUTPUTS(avfilter_af_join_outputs),
|
|
FILTER_QUERY_FUNC(join_query_formats),
|
|
.flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
|
|
};
|