| /* |
| * Copyright (c) 2011 Stefano Sabatini |
| * |
| * 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 |
| * buffer sink |
| */ |
| |
| #include "libavutil/audioconvert.h" |
| #include "libavutil/avassert.h" |
| #include "libavutil/fifo.h" |
| #include "avfilter.h" |
| #include "buffersink.h" |
| #include "audio.h" |
| #include "internal.h" |
| |
| AVBufferSinkParams *av_buffersink_params_alloc(void) |
| { |
| static const int pixel_fmts[] = { -1 }; |
| AVBufferSinkParams *params = av_malloc(sizeof(AVBufferSinkParams)); |
| if (!params) |
| return NULL; |
| |
| params->pixel_fmts = pixel_fmts; |
| return params; |
| } |
| |
| AVABufferSinkParams *av_abuffersink_params_alloc(void) |
| { |
| static const int sample_fmts[] = { -1 }; |
| static const int64_t channel_layouts[] = { -1 }; |
| AVABufferSinkParams *params = av_malloc(sizeof(AVABufferSinkParams)); |
| |
| if (!params) |
| return NULL; |
| |
| params->sample_fmts = sample_fmts; |
| params->channel_layouts = channel_layouts; |
| return params; |
| } |
| |
| typedef struct { |
| AVFifoBuffer *fifo; ///< FIFO buffer of video frame references |
| unsigned warning_limit; |
| |
| /* only used for video */ |
| enum PixelFormat *pixel_fmts; ///< list of accepted pixel formats, must be terminated with -1 |
| |
| /* only used for audio */ |
| enum AVSampleFormat *sample_fmts; ///< list of accepted sample formats, terminated by AV_SAMPLE_FMT_NONE |
| int64_t *channel_layouts; ///< list of accepted channel layouts, terminated by -1 |
| } BufferSinkContext; |
| |
| #define FIFO_INIT_SIZE 8 |
| |
| static av_cold int common_init(AVFilterContext *ctx) |
| { |
| BufferSinkContext *buf = ctx->priv; |
| |
| buf->fifo = av_fifo_alloc(FIFO_INIT_SIZE*sizeof(AVFilterBufferRef *)); |
| if (!buf->fifo) { |
| av_log(ctx, AV_LOG_ERROR, "Failed to allocate fifo\n"); |
| return AVERROR(ENOMEM); |
| } |
| buf->warning_limit = 100; |
| return 0; |
| } |
| |
| static av_cold void common_uninit(AVFilterContext *ctx) |
| { |
| BufferSinkContext *buf = ctx->priv; |
| AVFilterBufferRef *picref; |
| |
| if (buf->fifo) { |
| while (av_fifo_size(buf->fifo) >= sizeof(AVFilterBufferRef *)) { |
| av_fifo_generic_read(buf->fifo, &picref, sizeof(picref), NULL); |
| avfilter_unref_buffer(picref); |
| } |
| av_fifo_free(buf->fifo); |
| buf->fifo = NULL; |
| } |
| } |
| |
| static int add_buffer_ref(AVFilterContext *ctx, AVFilterBufferRef *ref) |
| { |
| BufferSinkContext *buf = ctx->priv; |
| |
| if (av_fifo_space(buf->fifo) < sizeof(AVFilterBufferRef *)) { |
| /* realloc fifo size */ |
| if (av_fifo_realloc2(buf->fifo, av_fifo_size(buf->fifo) * 2) < 0) { |
| av_log(ctx, AV_LOG_ERROR, |
| "Cannot buffer more frames. Consume some available frames " |
| "before adding new ones.\n"); |
| return AVERROR(ENOMEM); |
| } |
| } |
| |
| /* cache frame */ |
| av_fifo_generic_write(buf->fifo, &ref, sizeof(AVFilterBufferRef *), NULL); |
| return 0; |
| } |
| |
| static int end_frame(AVFilterLink *inlink) |
| { |
| AVFilterContext *ctx = inlink->dst; |
| BufferSinkContext *buf = inlink->dst->priv; |
| int ret; |
| |
| av_assert1(inlink->cur_buf); |
| if ((ret = add_buffer_ref(ctx, inlink->cur_buf)) < 0) |
| return ret; |
| inlink->cur_buf = NULL; |
| if (buf->warning_limit && |
| av_fifo_size(buf->fifo) / sizeof(AVFilterBufferRef *) >= buf->warning_limit) { |
| av_log(ctx, AV_LOG_WARNING, |
| "%d buffers queued in %s, something may be wrong.\n", |
| buf->warning_limit, |
| (char *)av_x_if_null(ctx->name, ctx->filter->name)); |
| buf->warning_limit *= 10; |
| } |
| return 0; |
| } |
| |
| void av_buffersink_set_frame_size(AVFilterContext *ctx, unsigned frame_size) |
| { |
| AVFilterLink *inlink = ctx->inputs[0]; |
| |
| inlink->min_samples = inlink->max_samples = |
| inlink->partial_buf_size = frame_size; |
| } |
| |
| int av_buffersink_get_buffer_ref(AVFilterContext *ctx, |
| AVFilterBufferRef **bufref, int flags) |
| { |
| BufferSinkContext *buf = ctx->priv; |
| AVFilterLink *inlink = ctx->inputs[0]; |
| int ret; |
| *bufref = NULL; |
| |
| av_assert0( !strcmp(ctx->filter->name, "buffersink") |
| || !strcmp(ctx->filter->name, "abuffersink") |
| || !strcmp(ctx->filter->name, "ffbuffersink") |
| || !strcmp(ctx->filter->name, "ffabuffersink")); |
| |
| /* no picref available, fetch it from the filterchain */ |
| if (!av_fifo_size(buf->fifo)) { |
| if (flags & AV_BUFFERSINK_FLAG_NO_REQUEST) |
| return AVERROR(EAGAIN); |
| if ((ret = ff_request_frame(inlink)) < 0) |
| return ret; |
| } |
| |
| if (!av_fifo_size(buf->fifo)) |
| return AVERROR(EINVAL); |
| |
| if (flags & AV_BUFFERSINK_FLAG_PEEK) |
| *bufref = *((AVFilterBufferRef **)av_fifo_peek2(buf->fifo, 0)); |
| else |
| av_fifo_generic_read(buf->fifo, bufref, sizeof(*bufref), NULL); |
| |
| return 0; |
| } |
| |
| AVRational av_buffersink_get_frame_rate(AVFilterContext *ctx) |
| { |
| av_assert0( !strcmp(ctx->filter->name, "buffersink") |
| || !strcmp(ctx->filter->name, "ffbuffersink")); |
| |
| return ctx->inputs[0]->frame_rate; |
| } |
| |
| int av_buffersink_poll_frame(AVFilterContext *ctx) |
| { |
| BufferSinkContext *buf = ctx->priv; |
| AVFilterLink *inlink = ctx->inputs[0]; |
| |
| av_assert0( !strcmp(ctx->filter->name, "buffersink") |
| || !strcmp(ctx->filter->name, "abuffersink") |
| || !strcmp(ctx->filter->name, "ffbuffersink") |
| || !strcmp(ctx->filter->name, "ffabuffersink")); |
| |
| return av_fifo_size(buf->fifo)/sizeof(AVFilterBufferRef *) + ff_poll_frame(inlink); |
| } |
| |
| static av_cold int vsink_init(AVFilterContext *ctx, const char *args, void *opaque) |
| { |
| BufferSinkContext *buf = ctx->priv; |
| AVBufferSinkParams *params = opaque; |
| |
| if (params && params->pixel_fmts) { |
| const int *pixel_fmts = params->pixel_fmts; |
| |
| buf->pixel_fmts = ff_copy_int_list(pixel_fmts); |
| if (!buf->pixel_fmts) |
| return AVERROR(ENOMEM); |
| } |
| |
| return common_init(ctx); |
| } |
| |
| static av_cold void vsink_uninit(AVFilterContext *ctx) |
| { |
| BufferSinkContext *buf = ctx->priv; |
| av_freep(&buf->pixel_fmts); |
| common_uninit(ctx); |
| } |
| |
| static int vsink_query_formats(AVFilterContext *ctx) |
| { |
| BufferSinkContext *buf = ctx->priv; |
| |
| if (buf->pixel_fmts) |
| ff_set_common_formats(ctx, ff_make_format_list(buf->pixel_fmts)); |
| else |
| ff_default_query_formats(ctx); |
| |
| return 0; |
| } |
| |
| AVFilter avfilter_vsink_ffbuffersink = { |
| .name = "ffbuffersink", |
| .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."), |
| .priv_size = sizeof(BufferSinkContext), |
| .init_opaque = vsink_init, |
| .uninit = vsink_uninit, |
| |
| .query_formats = vsink_query_formats, |
| |
| .inputs = (const AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .end_frame = end_frame, |
| .min_perms = AV_PERM_READ | AV_PERM_PRESERVE, }, |
| { .name = NULL }}, |
| .outputs = (const AVFilterPad[]) {{ .name = NULL }}, |
| }; |
| |
| AVFilter avfilter_vsink_buffersink = { |
| .name = "buffersink", |
| .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them available to the end of the filter graph."), |
| .priv_size = sizeof(BufferSinkContext), |
| .init_opaque = vsink_init, |
| .uninit = vsink_uninit, |
| |
| .query_formats = vsink_query_formats, |
| |
| .inputs = (const AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .end_frame = end_frame, |
| .min_perms = AV_PERM_READ | AV_PERM_PRESERVE, }, |
| { .name = NULL }}, |
| .outputs = (const AVFilterPad[]) {{ .name = NULL }}, |
| }; |
| |
| static int filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref) |
| { |
| end_frame(link); |
| return 0; |
| } |
| |
| static av_cold int asink_init(AVFilterContext *ctx, const char *args, void *opaque) |
| { |
| BufferSinkContext *buf = ctx->priv; |
| AVABufferSinkParams *params = opaque; |
| |
| if (params && params->sample_fmts) { |
| buf->sample_fmts = ff_copy_int_list (params->sample_fmts); |
| if (!buf->sample_fmts) |
| goto fail_enomem; |
| } |
| if (params && params->channel_layouts) { |
| buf->channel_layouts = ff_copy_int64_list(params->channel_layouts); |
| if (!buf->channel_layouts) |
| goto fail_enomem; |
| } |
| if (!common_init(ctx)) |
| return 0; |
| |
| fail_enomem: |
| av_freep(&buf->sample_fmts); |
| av_freep(&buf->channel_layouts); |
| return AVERROR(ENOMEM); |
| } |
| |
| static av_cold void asink_uninit(AVFilterContext *ctx) |
| { |
| BufferSinkContext *buf = ctx->priv; |
| |
| av_freep(&buf->sample_fmts); |
| av_freep(&buf->channel_layouts); |
| common_uninit(ctx); |
| } |
| |
| static int asink_query_formats(AVFilterContext *ctx) |
| { |
| BufferSinkContext *buf = ctx->priv; |
| AVFilterFormats *formats = NULL; |
| AVFilterChannelLayouts *layouts = NULL; |
| |
| if (buf->sample_fmts) { |
| if (!(formats = ff_make_format_list(buf->sample_fmts))) |
| return AVERROR(ENOMEM); |
| ff_set_common_formats(ctx, formats); |
| } |
| |
| if (buf->channel_layouts) { |
| if (!(layouts = avfilter_make_format64_list(buf->channel_layouts))) |
| return AVERROR(ENOMEM); |
| ff_set_common_channel_layouts(ctx, layouts); |
| } |
| |
| return 0; |
| } |
| |
| AVFilter avfilter_asink_ffabuffersink = { |
| .name = "ffabuffersink", |
| .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."), |
| .init_opaque = asink_init, |
| .uninit = asink_uninit, |
| .priv_size = sizeof(BufferSinkContext), |
| .query_formats = asink_query_formats, |
| |
| .inputs = (const AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_AUDIO, |
| .filter_samples = filter_samples, |
| .min_perms = AV_PERM_READ | AV_PERM_PRESERVE, }, |
| { .name = NULL }}, |
| .outputs = (const AVFilterPad[]) {{ .name = NULL }}, |
| }; |
| |
| AVFilter avfilter_asink_abuffersink = { |
| .name = "abuffersink", |
| .description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."), |
| .init_opaque = asink_init, |
| .uninit = asink_uninit, |
| .priv_size = sizeof(BufferSinkContext), |
| .query_formats = asink_query_formats, |
| |
| .inputs = (const AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_AUDIO, |
| .filter_samples = filter_samples, |
| .min_perms = AV_PERM_READ | AV_PERM_PRESERVE, }, |
| { .name = NULL }}, |
| .outputs = (const AVFilterPad[]) {{ .name = NULL }}, |
| }; |
| |
| /* Libav compatibility API */ |
| |
| extern AVFilter avfilter_vsink_buffer; |
| extern AVFilter avfilter_asink_abuffer; |
| |
| int av_buffersink_read(AVFilterContext *ctx, AVFilterBufferRef **buf) |
| { |
| AVFilterBufferRef *tbuf; |
| int ret; |
| |
| if (ctx->filter-> inputs[0].start_frame == |
| avfilter_vsink_buffer. inputs[0].start_frame || |
| ctx->filter-> inputs[0].filter_samples == |
| avfilter_asink_abuffer.inputs[0].filter_samples) |
| return ff_buffersink_read_compat(ctx, buf); |
| av_assert0(ctx->filter-> inputs[0].end_frame == |
| avfilter_vsink_ffbuffersink. inputs[0].end_frame || |
| ctx->filter-> inputs[0].filter_samples == |
| avfilter_asink_ffabuffersink.inputs[0].filter_samples); |
| |
| ret = av_buffersink_get_buffer_ref(ctx, &tbuf, |
| buf ? 0 : AV_BUFFERSINK_FLAG_PEEK); |
| if (!buf) |
| return ret >= 0; |
| if (ret < 0) |
| return ret; |
| *buf = tbuf; |
| return 0; |
| } |
| |
| int av_buffersink_read_samples(AVFilterContext *ctx, AVFilterBufferRef **buf, |
| int nb_samples) |
| { |
| BufferSinkContext *sink = ctx->priv; |
| int ret = 0, have_samples = 0, need_samples; |
| AVFilterBufferRef *tbuf, *in_buf; |
| AVFilterLink *link = ctx->inputs[0]; |
| int nb_channels = av_get_channel_layout_nb_channels(link->channel_layout); |
| |
| if (ctx->filter-> inputs[0].filter_samples == |
| avfilter_asink_abuffer.inputs[0].filter_samples) |
| return ff_buffersink_read_samples_compat(ctx, buf, nb_samples); |
| av_assert0(ctx->filter-> inputs[0].filter_samples == |
| avfilter_asink_ffabuffersink.inputs[0].filter_samples); |
| |
| tbuf = ff_get_audio_buffer(link, AV_PERM_WRITE, nb_samples); |
| if (!tbuf) |
| return AVERROR(ENOMEM); |
| |
| while (have_samples < nb_samples) { |
| ret = av_buffersink_get_buffer_ref(ctx, &in_buf, |
| AV_BUFFERSINK_FLAG_PEEK); |
| if (ret < 0) { |
| if (ret == AVERROR_EOF && have_samples) { |
| nb_samples = have_samples; |
| ret = 0; |
| } |
| break; |
| } |
| |
| need_samples = FFMIN(in_buf->audio->nb_samples, |
| nb_samples - have_samples); |
| av_samples_copy(tbuf->extended_data, in_buf->extended_data, |
| have_samples, 0, need_samples, |
| nb_channels, in_buf->format); |
| have_samples += need_samples; |
| if (need_samples < in_buf->audio->nb_samples) { |
| in_buf->audio->nb_samples -= need_samples; |
| av_samples_copy(in_buf->extended_data, in_buf->extended_data, |
| 0, need_samples, in_buf->audio->nb_samples, |
| nb_channels, in_buf->format); |
| } else { |
| av_buffersink_get_buffer_ref(ctx, &in_buf, 0); |
| avfilter_unref_buffer(in_buf); |
| } |
| } |
| tbuf->audio->nb_samples = have_samples; |
| |
| if (ret < 0) { |
| av_assert0(!av_fifo_size(sink->fifo)); |
| if (have_samples) |
| add_buffer_ref(ctx, tbuf); |
| else |
| avfilter_unref_buffer(tbuf); |
| return ret; |
| } |
| |
| *buf = tbuf; |
| return 0; |
| } |