| /* |
| * Copyright (c) 2008 Vitor Sessak |
| * |
| * 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 |
| * memory buffer source filter |
| */ |
| |
| #include "audio.h" |
| #include "avfilter.h" |
| #include "buffersrc.h" |
| #include "formats.h" |
| #include "internal.h" |
| #include "vsrc_buffer.h" |
| #include "avcodec.h" |
| |
| #include "libavutil/audioconvert.h" |
| #include "libavutil/fifo.h" |
| #include "libavutil/imgutils.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/samplefmt.h" |
| |
| typedef struct { |
| const AVClass *class; |
| AVFifoBuffer *fifo; |
| AVRational time_base; ///< time_base to set in the output link |
| unsigned nb_failed_requests; |
| |
| /* video only */ |
| int h, w; |
| enum PixelFormat pix_fmt; |
| AVRational pixel_aspect; |
| char sws_param[256]; |
| |
| /* audio only */ |
| int sample_rate; |
| enum AVSampleFormat sample_fmt; |
| char *sample_fmt_str; |
| uint64_t channel_layout; |
| char *channel_layout_str; |
| |
| int eof; |
| } BufferSourceContext; |
| |
| #define CHECK_VIDEO_PARAM_CHANGE(s, c, width, height, format)\ |
| if (c->w != width || c->h != height || c->pix_fmt != format) {\ |
| av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\ |
| return AVERROR(EINVAL);\ |
| } |
| |
| #define CHECK_AUDIO_PARAM_CHANGE(s, c, srate, ch_layout, format)\ |
| if (c->sample_fmt != format || c->sample_rate != srate ||\ |
| c->channel_layout != ch_layout) {\ |
| av_log(s, AV_LOG_ERROR, "Changing frame properties on the fly is not supported.\n");\ |
| return AVERROR(EINVAL);\ |
| } |
| |
| static AVFilterBufferRef *copy_buffer_ref(AVFilterContext *ctx, |
| AVFilterBufferRef *ref) |
| { |
| AVFilterLink *outlink = ctx->outputs[0]; |
| AVFilterBufferRef *buf; |
| int channels; |
| |
| switch (outlink->type) { |
| |
| case AVMEDIA_TYPE_VIDEO: |
| buf = avfilter_get_video_buffer(outlink, AV_PERM_WRITE, |
| ref->video->w, ref->video->h); |
| if(!buf) |
| return NULL; |
| av_image_copy(buf->data, buf->linesize, |
| (void*)ref->data, ref->linesize, |
| ref->format, ref->video->w, ref->video->h); |
| break; |
| |
| case AVMEDIA_TYPE_AUDIO: |
| buf = ff_get_audio_buffer(outlink, AV_PERM_WRITE, |
| ref->audio->nb_samples); |
| if(!buf) |
| return NULL; |
| channels = av_get_channel_layout_nb_channels(ref->audio->channel_layout); |
| av_samples_copy(buf->extended_data, ref->buf->extended_data, |
| 0, 0, ref->audio->nb_samples, |
| channels, |
| ref->format); |
| break; |
| |
| default: |
| return NULL; |
| } |
| avfilter_copy_buffer_ref_props(buf, ref); |
| return buf; |
| } |
| |
| #if FF_API_VSRC_BUFFER_ADD_FRAME |
| static int av_vsrc_buffer_add_frame_alt(AVFilterContext *buffer_filter, AVFrame *frame, |
| int64_t pts, AVRational pixel_aspect) |
| { |
| int64_t orig_pts = frame->pts; |
| AVRational orig_sar = frame->sample_aspect_ratio; |
| int ret; |
| |
| frame->pts = pts; |
| frame->sample_aspect_ratio = pixel_aspect; |
| if ((ret = av_buffersrc_write_frame(buffer_filter, frame)) < 0) |
| return ret; |
| frame->pts = orig_pts; |
| frame->sample_aspect_ratio = orig_sar; |
| |
| return 0; |
| } |
| #endif |
| |
| int av_buffersrc_add_frame(AVFilterContext *buffer_src, |
| const AVFrame *frame, int flags) |
| { |
| AVFilterBufferRef *picref; |
| int ret; |
| |
| if (!frame) /* NULL for EOF */ |
| return av_buffersrc_add_ref(buffer_src, NULL, flags); |
| |
| switch (buffer_src->outputs[0]->type) { |
| case AVMEDIA_TYPE_VIDEO: |
| picref = avfilter_get_video_buffer_ref_from_frame(frame, AV_PERM_WRITE); |
| break; |
| case AVMEDIA_TYPE_AUDIO: |
| picref = avfilter_get_audio_buffer_ref_from_frame(frame, AV_PERM_WRITE); |
| break; |
| default: |
| return AVERROR(ENOSYS); |
| } |
| if (!picref) |
| return AVERROR(ENOMEM); |
| ret = av_buffersrc_add_ref(buffer_src, picref, flags); |
| picref->buf->data[0] = NULL; |
| avfilter_unref_buffer(picref); |
| return ret; |
| } |
| |
| int av_buffersrc_write_frame(AVFilterContext *buffer_filter, AVFrame *frame) |
| { |
| return av_buffersrc_add_frame(buffer_filter, frame, 0); |
| } |
| |
| int av_buffersrc_add_ref(AVFilterContext *s, AVFilterBufferRef *buf, int flags) |
| { |
| BufferSourceContext *c = s->priv; |
| AVFilterBufferRef *to_free = NULL; |
| int ret; |
| |
| if (!buf) { |
| c->eof = 1; |
| return 0; |
| } else if (c->eof) |
| return AVERROR(EINVAL); |
| |
| if (!av_fifo_space(c->fifo) && |
| (ret = av_fifo_realloc2(c->fifo, av_fifo_size(c->fifo) + |
| sizeof(buf))) < 0) |
| return ret; |
| |
| if (!(flags & AV_BUFFERSRC_FLAG_NO_CHECK_FORMAT)) { |
| switch (s->outputs[0]->type) { |
| case AVMEDIA_TYPE_VIDEO: |
| CHECK_VIDEO_PARAM_CHANGE(s, c, buf->video->w, buf->video->h, buf->format); |
| break; |
| case AVMEDIA_TYPE_AUDIO: |
| CHECK_AUDIO_PARAM_CHANGE(s, c, buf->audio->sample_rate, buf->audio->channel_layout, |
| buf->format); |
| break; |
| default: |
| return AVERROR(EINVAL); |
| } |
| } |
| if (!(flags & AV_BUFFERSRC_FLAG_NO_COPY)) |
| to_free = buf = copy_buffer_ref(s, buf); |
| if(!buf) |
| return -1; |
| |
| if ((ret = av_fifo_generic_write(c->fifo, &buf, sizeof(buf), NULL)) < 0) { |
| avfilter_unref_buffer(to_free); |
| return ret; |
| } |
| c->nb_failed_requests = 0; |
| |
| return 0; |
| } |
| |
| int av_buffersrc_buffer(AVFilterContext *s, AVFilterBufferRef *buf) |
| { |
| return av_buffersrc_add_ref(s, buf, AV_BUFFERSRC_FLAG_NO_COPY); |
| } |
| |
| unsigned av_buffersrc_get_nb_failed_requests(AVFilterContext *buffer_src) |
| { |
| return ((BufferSourceContext *)buffer_src->priv)->nb_failed_requests; |
| } |
| |
| static av_cold int init_video(AVFilterContext *ctx, const char *args, void *opaque) |
| { |
| BufferSourceContext *c = ctx->priv; |
| char pix_fmt_str[128]; |
| int ret, n = 0; |
| *c->sws_param = 0; |
| |
| if (!args || |
| (n = sscanf(args, "%d:%d:%127[^:]:%d:%d:%d:%d:%255c", &c->w, &c->h, pix_fmt_str, |
| &c->time_base.num, &c->time_base.den, |
| &c->pixel_aspect.num, &c->pixel_aspect.den, c->sws_param)) < 7) { |
| av_log(ctx, AV_LOG_ERROR, "Expected at least 7 arguments, but only %d found in '%s'\n", n, args); |
| return AVERROR(EINVAL); |
| } |
| |
| if ((ret = ff_parse_pixel_format(&c->pix_fmt, pix_fmt_str, ctx)) < 0) |
| return ret; |
| |
| if (!(c->fifo = av_fifo_alloc(sizeof(AVFilterBufferRef*)))) |
| return AVERROR(ENOMEM); |
| |
| av_log(ctx, AV_LOG_INFO, "w:%d h:%d pixfmt:%s tb:%d/%d sar:%d/%d sws_param:%s\n", |
| c->w, c->h, av_pix_fmt_descriptors[c->pix_fmt].name, |
| c->time_base.num, c->time_base.den, |
| c->pixel_aspect.num, c->pixel_aspect.den, c->sws_param); |
| return 0; |
| } |
| |
| #define OFFSET(x) offsetof(BufferSourceContext, x) |
| #define A AV_OPT_FLAG_AUDIO_PARAM |
| static const AVOption audio_options[] = { |
| { "time_base", NULL, OFFSET(time_base), AV_OPT_TYPE_RATIONAL, { 0 }, 0, INT_MAX, A }, |
| { "sample_rate", NULL, OFFSET(sample_rate), AV_OPT_TYPE_INT, { 0 }, 0, INT_MAX, A }, |
| { "sample_fmt", NULL, OFFSET(sample_fmt_str), AV_OPT_TYPE_STRING, .flags = A }, |
| { "channel_layout", NULL, OFFSET(channel_layout_str), AV_OPT_TYPE_STRING, .flags = A }, |
| { NULL }, |
| }; |
| |
| static const AVClass abuffer_class = { |
| .class_name = "abuffer source", |
| .item_name = av_default_item_name, |
| .option = audio_options, |
| .version = LIBAVUTIL_VERSION_INT, |
| }; |
| |
| static av_cold int init_audio(AVFilterContext *ctx, const char *args, void *opaque) |
| { |
| BufferSourceContext *s = ctx->priv; |
| int ret = 0; |
| |
| s->class = &abuffer_class; |
| av_opt_set_defaults(s); |
| |
| if ((ret = av_set_options_string(s, args, "=", ":")) < 0) { |
| av_log(ctx, AV_LOG_ERROR, "Error parsing options string: %s.\n", args); |
| goto fail; |
| } |
| |
| s->sample_fmt = av_get_sample_fmt(s->sample_fmt_str); |
| if (s->sample_fmt == AV_SAMPLE_FMT_NONE) { |
| av_log(ctx, AV_LOG_ERROR, "Invalid sample format %s.\n", |
| s->sample_fmt_str); |
| ret = AVERROR(EINVAL); |
| goto fail; |
| } |
| |
| s->channel_layout = av_get_channel_layout(s->channel_layout_str); |
| if (!s->channel_layout) { |
| av_log(ctx, AV_LOG_ERROR, "Invalid channel layout %s.\n", |
| s->channel_layout_str); |
| ret = AVERROR(EINVAL); |
| goto fail; |
| } |
| |
| if (!(s->fifo = av_fifo_alloc(sizeof(AVFilterBufferRef*)))) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| |
| if (!s->time_base.num) |
| s->time_base = (AVRational){1, s->sample_rate}; |
| |
| av_log(ctx, AV_LOG_VERBOSE, "tb:%d/%d samplefmt:%s samplerate: %d " |
| "ch layout:%s\n", s->time_base.num, s->time_base.den, s->sample_fmt_str, |
| s->sample_rate, s->channel_layout_str); |
| |
| fail: |
| av_opt_free(s); |
| return ret; |
| } |
| |
| static av_cold void uninit(AVFilterContext *ctx) |
| { |
| BufferSourceContext *s = ctx->priv; |
| while (s->fifo && av_fifo_size(s->fifo)) { |
| AVFilterBufferRef *buf; |
| av_fifo_generic_read(s->fifo, &buf, sizeof(buf), NULL); |
| avfilter_unref_buffer(buf); |
| } |
| av_fifo_free(s->fifo); |
| s->fifo = NULL; |
| } |
| |
| static int query_formats(AVFilterContext *ctx) |
| { |
| BufferSourceContext *c = ctx->priv; |
| AVFilterChannelLayouts *channel_layouts = NULL; |
| AVFilterFormats *formats = NULL; |
| AVFilterFormats *samplerates = NULL; |
| |
| switch (ctx->outputs[0]->type) { |
| case AVMEDIA_TYPE_VIDEO: |
| avfilter_add_format(&formats, c->pix_fmt); |
| avfilter_set_common_formats(ctx, formats); |
| break; |
| case AVMEDIA_TYPE_AUDIO: |
| avfilter_add_format(&formats, c->sample_fmt); |
| avfilter_set_common_formats(ctx, formats); |
| |
| avfilter_add_format(&samplerates, c->sample_rate); |
| ff_set_common_samplerates(ctx, samplerates); |
| |
| ff_add_channel_layout(&channel_layouts, c->channel_layout); |
| ff_set_common_channel_layouts(ctx, channel_layouts); |
| break; |
| default: |
| return AVERROR(EINVAL); |
| } |
| |
| return 0; |
| } |
| |
| static int config_props(AVFilterLink *link) |
| { |
| BufferSourceContext *c = link->src->priv; |
| |
| switch (link->type) { |
| case AVMEDIA_TYPE_VIDEO: |
| link->w = c->w; |
| link->h = c->h; |
| link->sample_aspect_ratio = c->pixel_aspect; |
| break; |
| case AVMEDIA_TYPE_AUDIO: |
| link->channel_layout = c->channel_layout; |
| link->sample_rate = c->sample_rate; |
| break; |
| default: |
| return AVERROR(EINVAL); |
| } |
| |
| link->time_base = c->time_base; |
| return 0; |
| } |
| |
| static int request_frame(AVFilterLink *link) |
| { |
| BufferSourceContext *c = link->src->priv; |
| AVFilterBufferRef *buf; |
| |
| if (!av_fifo_size(c->fifo)) { |
| if (c->eof) |
| return AVERROR_EOF; |
| c->nb_failed_requests++; |
| return AVERROR(EAGAIN); |
| } |
| av_fifo_generic_read(c->fifo, &buf, sizeof(buf), NULL); |
| |
| switch (link->type) { |
| case AVMEDIA_TYPE_VIDEO: |
| avfilter_start_frame(link, avfilter_ref_buffer(buf, ~0)); |
| avfilter_draw_slice(link, 0, link->h, 1); |
| avfilter_end_frame(link); |
| break; |
| case AVMEDIA_TYPE_AUDIO: |
| ff_filter_samples(link, avfilter_ref_buffer(buf, ~0)); |
| break; |
| default: |
| return AVERROR(EINVAL); |
| } |
| |
| avfilter_unref_buffer(buf); |
| |
| return 0; |
| } |
| |
| static int poll_frame(AVFilterLink *link) |
| { |
| BufferSourceContext *c = link->src->priv; |
| int size = av_fifo_size(c->fifo); |
| if (!size && c->eof) |
| return AVERROR_EOF; |
| return size/sizeof(AVFilterBufferRef*); |
| } |
| |
| AVFilter avfilter_vsrc_buffer = { |
| .name = "buffer", |
| .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."), |
| .priv_size = sizeof(BufferSourceContext), |
| .query_formats = query_formats, |
| |
| .init = init_video, |
| .uninit = uninit, |
| |
| .inputs = (AVFilterPad[]) {{ .name = NULL }}, |
| .outputs = (AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .request_frame = request_frame, |
| .poll_frame = poll_frame, |
| .config_props = config_props, }, |
| { .name = NULL}}, |
| }; |
| |
| AVFilter avfilter_asrc_abuffer = { |
| .name = "abuffer", |
| .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them accessible to the filterchain."), |
| .priv_size = sizeof(BufferSourceContext), |
| .query_formats = query_formats, |
| |
| .init = init_audio, |
| .uninit = uninit, |
| |
| .inputs = (AVFilterPad[]) {{ .name = NULL }}, |
| .outputs = (AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_AUDIO, |
| .request_frame = request_frame, |
| .poll_frame = poll_frame, |
| .config_props = config_props, }, |
| { .name = NULL}}, |
| }; |