diff options
Diffstat (limited to 'libavfilter/sink_buffer.c')
| -rw-r--r-- | libavfilter/sink_buffer.c | 485 |
1 files changed, 485 insertions, 0 deletions
diff --git a/libavfilter/sink_buffer.c b/libavfilter/sink_buffer.c new file mode 100644 index 0000000000..0edf9c5e0b --- /dev/null +++ b/libavfilter/sink_buffer.c @@ -0,0 +1,485 @@ +/* + * 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/avassert.h" +#include "libavutil/channel_layout.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[] = { AV_PIX_FMT_NONE }; + AVBufferSinkParams *params = av_malloc(sizeof(AVBufferSinkParams)); + if (!params) + return NULL; + + params->pixel_fmts = pixel_fmts; + return params; +} + +AVABufferSinkParams *av_abuffersink_params_alloc(void) +{ + AVABufferSinkParams *params = av_mallocz(sizeof(AVABufferSinkParams)); + + if (!params) + return NULL; + return params; +} + +typedef struct { + AVFifoBuffer *fifo; ///< FIFO buffer of video frame references + unsigned warning_limit; + + /* only used for video */ + enum AVPixelFormat *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 + int all_channel_counts; +} 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 filter_frame(AVFilterLink *inlink, AVFilterBufferRef *ref) +{ + AVFilterContext *ctx = inlink->dst; + BufferSinkContext *buf = inlink->dst->priv; + int ret; + + if ((ret = add_buffer_ref(ctx, ref)) < 0) + return ret; + 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; +} + +static const AVFilterPad ffbuffersink_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .filter_frame = filter_frame, + .min_perms = AV_PERM_READ | AV_PERM_PRESERVE, + }, + { NULL }, +}; + +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 = ffbuffersink_inputs, + .outputs = NULL, +}; + +static const AVFilterPad buffersink_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_VIDEO, + .filter_frame = filter_frame, + .min_perms = AV_PERM_READ | AV_PERM_PRESERVE, + }, + { 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 = buffersink_inputs, + .outputs = NULL, +}; + +static int64_t *concat_channels_lists(const int64_t *layouts, const int *counts) +{ + int nb_layouts = 0, nb_counts = 0, i; + int64_t *list; + + if (layouts) + for (; layouts[nb_layouts] != -1; nb_layouts++); + if (counts) + for (; counts[nb_counts] != -1; nb_counts++); + if (nb_counts > INT_MAX - 1 - nb_layouts) + return NULL; + if (!(list = av_calloc(nb_layouts + nb_counts + 1, sizeof(*list)))) + return NULL; + for (i = 0; i < nb_layouts; i++) + list[i] = layouts[i]; + for (i = 0; i < nb_counts; i++) + list[nb_layouts + i] = FF_COUNT2LAYOUT(counts[i]); + list[nb_layouts + nb_counts] = -1; + return list; +} + +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) + return AVERROR(ENOMEM); + } + if (params && (params->channel_layouts || params->channel_counts)) { + if (params->all_channel_counts) { + av_log(ctx, AV_LOG_ERROR, + "Conflicting all_channel_counts and list in parameters\n"); + return AVERROR(EINVAL); + } + buf->channel_layouts = concat_channels_lists(params->channel_layouts, + params->channel_counts); + if (!buf->channel_layouts) + return AVERROR(ENOMEM); + } + if (params) + buf->all_channel_counts = params->all_channel_counts; + return common_init(ctx); +} + +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 || buf->all_channel_counts) { + layouts = buf->all_channel_counts ? ff_all_channel_counts() : + avfilter_make_format64_list(buf->channel_layouts); + if (!layouts) + return AVERROR(ENOMEM); + ff_set_common_channel_layouts(ctx, layouts); + } + + return 0; +} + +static const AVFilterPad ffabuffersink_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_AUDIO, + .filter_frame = filter_frame, + .min_perms = AV_PERM_READ | AV_PERM_PRESERVE, + }, + { NULL }, +}; + +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 = ffabuffersink_inputs, + .outputs = NULL, +}; + +static const AVFilterPad abuffersink_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_AUDIO, + .filter_frame = filter_frame, + .min_perms = AV_PERM_READ | AV_PERM_PRESERVE, + }, + { 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 = abuffersink_inputs, + .outputs = 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_frame == + avfilter_asink_abuffer.inputs[0].filter_frame) + 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_frame == + avfilter_asink_ffabuffersink.inputs[0].filter_frame); + + 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_frame == + avfilter_asink_abuffer.inputs[0].filter_frame) + return ff_buffersink_read_samples_compat(ctx, buf, nb_samples); + av_assert0(ctx->filter-> inputs[0].filter_frame == + avfilter_asink_ffabuffersink.inputs[0].filter_frame); + + 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; +} |