/* * 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 */ /** * @file * Audio join filter * * Join multiple audio inputs as different channels in * a single output */ #include "libavutil/avassert.h"#include "libavutil/avstring.h"#include "libavutil/channel_layout.h"#include "libavutil/common.h"#include "libavutil/mem.h"#include "libavutil/opt.h" #include "audio.h"#include "avfilter.h"#include "formats.h"#include "filters.h" typedef struct ChannelMap {    int input;                     ///< input stream index    int            in_channel_idx; ///< index of in_channel in the input stream data    enum AVChannel in_channel;    enum AVChannel out_channel;} ChannelMap; typedef struct JoinContext {    const AVClass *class;     int inputs;    char *map;    AVChannelLayout ch_layout;     int64_t  eof_pts;    int eof;     ChannelMap *channels;     /**     * Temporary storage for input frames, until we get one on each input.     */    AVFrame **input_frames;     /**     *  Temporary storage for buffer references, for assembling the output frame.     */    AVBufferRef **buffers;} JoinContext; #define OFFSET(x) offsetof(JoinContext, x)#define A AV_OPT_FLAG_AUDIO_PARAM#define F AV_OPT_FLAG_FILTERING_PARAMstatic const AVOption join_options[] = {    { "inputs",         "Number of input streams.", OFFSET(inputs),             AV_OPT_TYPE_INT,    { .i64 = 2 }, 1, INT_MAX,       A|F },    { "channel_layout", "Channel layout of the "                        "output stream.",           OFFSET(ch_layout),          AV_OPT_TYPE_CHLAYOUT, {.str = "stereo"}, 0, 0, A|F },    { "map",            "A comma-separated list of channels maps in the format "                        "'input_stream.input_channel-output_channel.",                                                    OFFSET(map),                AV_OPT_TYPE_STRING,                 .flags = A|F },    { NULL }}; #define MAP_SEPARATOR '|' AVFILTER_DEFINE_CLASS(join); static int parse_maps(AVFilterContext *ctx){    JoinContext *s = ctx->priv;    char *cur      = s->map;     while (cur && *cur) {        ChannelMap *map;        char *sep, *next, *p;        int input_idx, out_ch_idx;         next = strchr(cur, MAP_SEPARATOR);        if (next)            *next++ = 0;         /* split the map into input and output parts */        if (!(sep = strchr(cur, '-'))) {            av_log(ctx, AV_LOG_ERROR, "Missing separator '-' in channel "                   "map '%s'\n", cur);            return AVERROR(EINVAL);        }        *sep++ = 0;         /* parse output channel */        out_ch_idx = av_channel_layout_index_from_string(&s->ch_layout, sep);        if (out_ch_idx < 0) {            av_log(ctx, AV_LOG_ERROR, "Invalid output channel: %s.\n", sep);            return AVERROR(EINVAL);        }         map = &s->channels[out_ch_idx];         if (map->input >= 0) {            av_log(ctx, AV_LOG_ERROR, "Multiple maps for output channel "                   "'%s'.\n", sep);            return AVERROR(EINVAL);        }         /* parse input channel */        input_idx = strtol(cur, &cur, 0);        if (input_idx < 0 || input_idx >= s->inputs) {            av_log(ctx, AV_LOG_ERROR, "Invalid input stream index: %d.\n",                   input_idx);            return AVERROR(EINVAL);        }         if (*cur)            cur++;         map->input          = input_idx;        map->in_channel     = AV_CHAN_NONE;        map->in_channel_idx = strtol(cur, &p, 0);        if (p == cur) {            /* channel specifier is not a number, handle as channel name */            map->in_channel = av_channel_from_string(cur);            if (map->in_channel < 0) {                av_log(ctx, AV_LOG_ERROR, "Invalid input channel: %s.\n", cur);                return AVERROR(EINVAL);            }        } else if (map->in_channel_idx < 0) {            av_log(ctx, AV_LOG_ERROR, "Invalid input channel index: %d\n", map->in_channel_idx);            return AVERROR(EINVAL);        }         cur = next;    }    return 0;} static av_cold int join_init(AVFilterContext *ctx){    JoinContext *s = ctx->priv;    int ret, i;     s->channels     = av_calloc(s->ch_layout.nb_channels, sizeof(*s->channels));    s->buffers      = av_calloc(s->ch_layout.nb_channels, sizeof(*s->buffers));    s->input_frames = av_calloc(s->inputs, sizeof(*s->input_frames));    if (!s->channels || !s->buffers|| !s->input_frames)        return AVERROR(ENOMEM);     for (i = 0; i < s->ch_layout.nb_channels; i++) {        s->channels[i].out_channel    = av_channel_layout_channel_from_index(&s->ch_layout, i);        s->channels[i].input          = -1;        s->channels[i].in_channel_idx = -1;        s->channels[i].in_channel     = AV_CHAN_NONE;    }     if ((ret = parse_maps(ctx)) < 0)        return ret;     for (i = 0; i < s->inputs; i++) {        AVFilterPad pad = { 0 };         pad.type = AVMEDIA_TYPE_AUDIO;        pad.name = av_asprintf("input%d", i);        if (!pad.name)            return AVERROR(ENOMEM);         if ((ret = ff_append_inpad_free_name(ctx, &pad)) < 0)            return ret;    }     return 0;} static av_cold void join_uninit(AVFilterContext *ctx){    JoinContext *s = ctx->priv;    int i;     for (i = 0; i < s->inputs && s->input_frames; i++) {        av_frame_free(&s->input_frames[i]);    }     av_freep(&s->channels);    av_freep(&s->buffers);    av_freep(&s->input_frames);} static int join_query_formats(const AVFilterContext *ctx,                              AVFilterFormatsConfig **cfg_in,                              AVFilterFormatsConfig **cfg_out){    const JoinContext *s = ctx->priv;    AVFilterChannelLayouts *layouts = NULL;    int i, ret;     if ((ret = ff_add_channel_layout(&layouts, &s->ch_layout)) < 0 ||        (ret = ff_channel_layouts_ref(layouts, &cfg_out[0]->channel_layouts)) < 0)        return ret;     for (i = 0; i < ctx->nb_inputs; i++) {        layouts = ff_all_channel_layouts();        if ((ret = ff_channel_layouts_ref(layouts, &cfg_in[i]->channel_layouts)) < 0)            return ret;    }     if ((ret = ff_set_common_formats2(ctx, cfg_in, cfg_out, ff_planar_sample_fmts())) < 0)        return ret;     return 0;} typedef struct ChannelList {    enum AVChannel *ch;    int          nb_ch;} ChannelList; static enum AVChannel channel_list_pop(ChannelList *chl, int idx){    enum AVChannel ret = chl->ch[idx];    memmove(chl->ch + idx, chl->ch + idx + 1,            (chl->nb_ch - idx - 1) * sizeof(*chl->ch));    chl->nb_ch--;    return ret;} /* * If ch is present in chl, remove it from the list and return it. * Otherwise return AV_CHAN_NONE. */static enum AVChannel channel_list_pop_ch(ChannelList *chl, enum AVChannel ch){    for (int i = 0; i < chl->nb_ch; i++)        if (chl->ch[i] == ch)            return channel_list_pop(chl, i);    return AV_CHAN_NONE;} static void guess_map_matching(AVFilterContext *ctx, ChannelMap *ch,                               ChannelList *inputs){    int i;     for (i = 0; i < ctx->nb_inputs; i++) {        if (channel_list_pop_ch(&inputs[i], ch->out_channel) != AV_CHAN_NONE) {            ch->input      = i;            ch->in_channel = ch->out_channel;            return;        }    }} static void guess_map_any(AVFilterContext *ctx, ChannelMap *ch,                          ChannelList *inputs){    int i;     for (i = 0; i < ctx->nb_inputs; i++) {        if (inputs[i].nb_ch) {            ch->input      = i;            ch->in_channel = channel_list_pop(&inputs[i], 0);            return;        }    }} static int join_config_output(AVFilterLink *outlink){    AVFilterContext *ctx = outlink->src;    JoinContext       *s = ctx->priv;    // unused channels from each input    ChannelList *inputs_unused;    char inbuf[64], outbuf[64];    int i, ret = 0;     /* initialize unused channel list for each input */    inputs_unused = av_calloc(ctx->nb_inputs, sizeof(*inputs_unused));    if (!inputs_unused)        return AVERROR(ENOMEM);    for (i = 0; i < ctx->nb_inputs; i++) {        AVFilterLink *inlink = ctx->inputs[i];        AVChannelLayout *chl = &inlink->ch_layout;        ChannelList      *iu = &inputs_unused[i];         iu->nb_ch = chl->nb_channels;        iu->ch    = av_malloc_array(iu->nb_ch, sizeof(*iu->ch));        if (!iu->ch) {            ret = AVERROR(ENOMEM);            goto fail;        }         for (int ch_idx = 0; ch_idx < iu->nb_ch; ch_idx++) {            iu->ch[ch_idx] = av_channel_layout_channel_from_index(chl, ch_idx);            if (iu->ch[ch_idx] < 0) {                /* no channel ordering information in this input,                 * so don't auto-map from it */                iu->nb_ch = 0;                break;            }        }    }     /* process user-specified maps */    for (i = 0; i < s->ch_layout.nb_channels; i++) {        ChannelMap *ch = &s->channels[i];        AVFilterLink *inlink;        AVChannelLayout *ichl;        ChannelList     *iu;         if (ch->input < 0)            continue;         inlink = ctx->inputs[ch->input];        ichl   = &inlink->ch_layout;        iu     = &inputs_unused[ch->input];         /* get the index for the channels defined by name */        if (ch->in_channel != AV_CHAN_NONE) {            ch->in_channel_idx = av_channel_layout_index_from_channel(ichl, ch->in_channel);            if (ch->in_channel_idx < 0) {                av_channel_name(inbuf, sizeof(inbuf), ch->in_channel);                av_log(ctx, AV_LOG_ERROR, "Requested channel %s is not present in "                       "input stream #%d.\n", inbuf,                       ch->input);                ret = AVERROR(EINVAL);                goto fail;            }        }         /* make sure channels specified by index actually exist */        if (ch->in_channel_idx >= ichl->nb_channels) {            av_log(ctx, AV_LOG_ERROR, "Requested channel with index %d is not "                   "present in input stream #%d.\n", ch->in_channel_idx, ch->input);            ret = AVERROR(EINVAL);            goto fail;        }         channel_list_pop_ch(iu, av_channel_layout_channel_from_index(ichl, ch->in_channel_idx));    }     /* guess channel maps when not explicitly defined */    /* first try unused matching channels */    for (i = 0; i < s->ch_layout.nb_channels; i++) {        ChannelMap *ch = &s->channels[i];         if (ch->input < 0)            guess_map_matching(ctx, ch, inputs_unused);    }     /* if the above failed, try to find _any_ unused input channel */    for (i = 0; i < s->ch_layout.nb_channels; i++) {        ChannelMap *ch = &s->channels[i];         if (ch->input < 0)            guess_map_any(ctx, ch, inputs_unused);         if (ch->input < 0) {            av_channel_name(outbuf, sizeof(outbuf), ch->out_channel);            av_log(ctx, AV_LOG_ERROR, "Could not find input channel for "                   "output channel '%s'.\n",                   outbuf);            ret = AVERROR(EINVAL);            goto fail;        }         if (ch->in_channel != AV_CHAN_NONE) {            ch->in_channel_idx = av_channel_layout_index_from_channel(                &ctx->inputs[ch->input]->ch_layout, ch->in_channel);        }         av_assert0(ch->in_channel_idx >= 0);    }     /* print mappings */    av_log(ctx, AV_LOG_VERBOSE, "mappings: ");    for (i = 0; i < s->ch_layout.nb_channels; i++) {        ChannelMap *ch = &s->channels[i];        AVFilterLink  *inlink = ctx->inputs[ch->input];        AVChannelLayout *ichl = &inlink->ch_layout;        enum AVChannel  in_ch = av_channel_layout_channel_from_index(                                    ichl, ch->in_channel_idx);         av_channel_name(inbuf, sizeof(inbuf), in_ch);        av_channel_name(outbuf, sizeof(outbuf), ch->out_channel);        av_log(ctx, AV_LOG_VERBOSE, "%d.%s(%d) => %s(%d) ", ch->input,               inbuf, ch->in_channel_idx,               outbuf, i);    }    av_log(ctx, AV_LOG_VERBOSE, "\n");     for (i = 0; i < ctx->nb_inputs; i++) {        if (inputs_unused[i].nb_ch == ctx->inputs[i]->ch_layout.nb_channels)            av_log(ctx, AV_LOG_WARNING, "No channels are used from input "                   "stream %d.\n", i);    } fail:    for (i = 0; i < ctx->nb_inputs; i++)        av_freep(&inputs_unused[i].ch);    av_freep(&inputs_unused);    return ret;} static int try_push_frame(AVFilterContext *ctx){    AVFilterLink *outlink = ctx->outputs[0];    JoinContext *s       = ctx->priv;    AVFrame *frame;    int linesize   = INT_MAX;    int nb_samples = INT_MAX;    int nb_buffers = 0;    int i, j, ret;     for (i = 0; i < ctx->nb_inputs; i++) {        if (!s->input_frames[i]) {            nb_samples = 0;            break;        } else {            nb_samples = FFMIN(nb_samples, s->input_frames[i]->nb_samples);        }    }    if (!nb_samples)        goto eof;     /* setup the output frame */    frame = av_frame_alloc();    if (!frame)        return AVERROR(ENOMEM);    if (s->ch_layout.nb_channels > FF_ARRAY_ELEMS(frame->data)) {        frame->extended_data = av_calloc(s->ch_layout.nb_channels,                                          sizeof(*frame->extended_data));        if (!frame->extended_data) {            ret = AVERROR(ENOMEM);            goto fail;        }    }     /* copy the data pointers */    for (i = 0; i < s->ch_layout.nb_channels; i++) {        ChannelMap *ch = &s->channels[i];        AVFrame *cur   = s->input_frames[ch->input];        AVBufferRef *buf;         frame->extended_data[i] = cur->extended_data[ch->in_channel_idx];        linesize = FFMIN(linesize, cur->linesize[0]);         /* add the buffer where this plan is stored to the list if it's         * not already there */        buf = av_frame_get_plane_buffer(cur, ch->in_channel_idx);        if (!buf) {            ret = AVERROR(EINVAL);            goto fail;        }        for (j = 0; j < nb_buffers; j++)            if (s->buffers[j]->buffer == buf->buffer)                break;        if (j == i)            s->buffers[nb_buffers++] = buf;    }     /* create references to the buffers we copied to output */    if (nb_buffers > FF_ARRAY_ELEMS(frame->buf)) {        frame->nb_extended_buf = nb_buffers - FF_ARRAY_ELEMS(frame->buf);        frame->extended_buf = av_calloc(frame->nb_extended_buf,                                        sizeof(*frame->extended_buf));        if (!frame->extended_buf) {            frame->nb_extended_buf = 0;            ret = AVERROR(ENOMEM);            goto fail;        }    }    for (i = 0; i < FFMIN(FF_ARRAY_ELEMS(frame->buf), nb_buffers); i++) {        frame->buf[i] = av_buffer_ref(s->buffers[i]);        if (!frame->buf[i]) {            ret = AVERROR(ENOMEM);            goto fail;        }    }    for (i = 0; i < frame->nb_extended_buf; i++) {        frame->extended_buf[i] = av_buffer_ref(s->buffers[i +                                               FF_ARRAY_ELEMS(frame->buf)]);        if (!frame->extended_buf[i]) {            ret = AVERROR(ENOMEM);            goto fail;        }

Lines 1–500 of 610. Load more