libavfilter/f_interleave.c - third_party/ffmpeg - Git at Google

 /*
  * Copyright (c) 2013 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
  * audio and video interleaver
  */

 #include "libavutil/avassert.h"
 #include "libavutil/avstring.h"
 #include "libavutil/opt.h"

 #define FF_INTERNAL_FIELDS 1
 #include "framequeue.h"

 #include "avfilter.h"
 #include "bufferqueue.h"
 #include "formats.h"
 #include "internal.h"
 #include "audio.h"
 #include "video.h"

 typedef struct InterleaveContext {
     const AVClass *class;
     int nb_inputs;
     struct FFBufQueue *queues;
 } InterleaveContext;

 #define OFFSET(x) offsetof(InterleaveContext, x)

 #define DEFINE_OPTIONS(filt_name, flags_)                           \
 static const AVOption filt_name##_options[] = {                     \
    { "nb_inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64 = 2}, 1, INT_MAX, .flags = flags_ }, \
    { "n",         "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64 = 2}, 1, INT_MAX, .flags = flags_ }, \
    { NULL }                                                         \
 }

 inline static int push_frame(AVFilterContext *ctx)
 {
     InterleaveContext *s = ctx->priv;
     AVFrame *frame;
     int i, queue_idx = -1;
     int64_t pts_min = INT64_MAX;

     /* look for oldest frame */
     for (i = 0; i < ctx->nb_inputs; i++) {
         struct FFBufQueue *q = &s->queues[i];

         if (!q->available && !ctx->inputs[i]->status_out)
             return 0;
         if (q->available) {
             frame = ff_bufqueue_peek(q, 0);
             if (frame->pts < pts_min) {
                 pts_min = frame->pts;
                 queue_idx = i;
             }
         }
     }

     /* all inputs are closed */
     if (queue_idx < 0)
         return AVERROR_EOF;

     frame = ff_bufqueue_get(&s->queues[queue_idx]);
     av_log(ctx, AV_LOG_DEBUG, "queue:%d -> frame time:%f\n",
            queue_idx, frame->pts * av_q2d(AV_TIME_BASE_Q));
     return ff_filter_frame(ctx->outputs[0], frame);
 }

 static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
 {
     AVFilterContext *ctx = inlink->dst;
     InterleaveContext *s = ctx->priv;
     unsigned in_no = FF_INLINK_IDX(inlink);

     if (frame->pts == AV_NOPTS_VALUE) {
         av_log(ctx, AV_LOG_WARNING,
                "NOPTS value for input frame cannot be accepted, frame discarded\n");
         av_frame_free(&frame);
         return AVERROR_INVALIDDATA;
     }

     /* queue frame */
     frame->pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q);
     av_log(ctx, AV_LOG_DEBUG, "frame pts:%f -> queue idx:%d available:%d\n",
            frame->pts * av_q2d(AV_TIME_BASE_Q), in_no, s->queues[in_no].available);
     ff_bufqueue_add(ctx, &s->queues[in_no], frame);

     return push_frame(ctx);
 }

 static av_cold int init(AVFilterContext *ctx)
 {
     InterleaveContext *s = ctx->priv;
     const AVFilterPad *outpad = &ctx->filter->outputs[0];
     int i, ret;

     s->queues = av_calloc(s->nb_inputs, sizeof(s->queues[0]));
     if (!s->queues)
         return AVERROR(ENOMEM);

     for (i = 0; i < s->nb_inputs; i++) {
         AVFilterPad inpad = { 0 };

         inpad.name = av_asprintf("input%d", i);
         if (!inpad.name)
             return AVERROR(ENOMEM);
         inpad.type         = outpad->type;
         inpad.filter_frame = filter_frame;

         switch (outpad->type) {
         case AVMEDIA_TYPE_VIDEO:
             inpad.get_video_buffer = ff_null_get_video_buffer; break;
         case AVMEDIA_TYPE_AUDIO:
             inpad.get_audio_buffer = ff_null_get_audio_buffer; break;
         default:
             av_assert0(0);
         }
         if ((ret = ff_insert_inpad(ctx, i, &inpad)) < 0) {
             av_freep(&inpad.name);
             return ret;
         }
     }

     return 0;
 }

 static av_cold void uninit(AVFilterContext *ctx)
 {
     InterleaveContext *s = ctx->priv;
     int i;

     for (i = 0; i < ctx->nb_inputs; i++) {
         ff_bufqueue_discard_all(&s->queues[i]);
         av_freep(&s->queues[i]);
         av_freep(&ctx->input_pads[i].name);
     }
 }

 static int config_output(AVFilterLink *outlink)
 {
     AVFilterContext *ctx = outlink->src;
     AVFilterLink *inlink0 = ctx->inputs[0];
     int i;

     if (outlink->type == AVMEDIA_TYPE_VIDEO) {
         outlink->time_base           = AV_TIME_BASE_Q;
         outlink->w                   = inlink0->w;
         outlink->h                   = inlink0->h;
         outlink->sample_aspect_ratio = inlink0->sample_aspect_ratio;
         outlink->format              = inlink0->format;
         outlink->frame_rate = (AVRational) {1, 0};
         for (i = 1; i < ctx->nb_inputs; i++) {
             AVFilterLink *inlink = ctx->inputs[i];

             if (outlink->w                       != inlink->w                       ||
                 outlink->h                       != inlink->h                       ||
                 outlink->sample_aspect_ratio.num != inlink->sample_aspect_ratio.num ||
                 outlink->sample_aspect_ratio.den != inlink->sample_aspect_ratio.den) {
                 av_log(ctx, AV_LOG_ERROR, "Parameters for input link %s "
                        "(size %dx%d, SAR %d:%d) do not match the corresponding "
                        "output link parameters (%dx%d, SAR %d:%d)\n",
                        ctx->input_pads[i].name, inlink->w, inlink->h,
                        inlink->sample_aspect_ratio.num,
                        inlink->sample_aspect_ratio.den,
                        outlink->w, outlink->h,
                        outlink->sample_aspect_ratio.num,
                        outlink->sample_aspect_ratio.den);
                 return AVERROR(EINVAL);
             }
         }
     }
     return 0;
 }

 static int request_frame(AVFilterLink *outlink)
 {
     AVFilterContext *ctx = outlink->src;
     InterleaveContext *s = ctx->priv;
     int i, ret;

     for (i = 0; i < ctx->nb_inputs; i++) {
         if (!s->queues[i].available && !ctx->inputs[i]->status_out) {
             ret = ff_request_frame(ctx->inputs[i]);
             if (ret != AVERROR_EOF)
                 return ret;
         }
     }

     return push_frame(ctx);
 }

 #if CONFIG_INTERLEAVE_FILTER

 DEFINE_OPTIONS(interleave, AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
 AVFILTER_DEFINE_CLASS(interleave);

 static const AVFilterPad interleave_outputs[] = {
     {
         .name          = "default",
         .type          = AVMEDIA_TYPE_VIDEO,
         .config_props  = config_output,
         .request_frame = request_frame,
     },
     { NULL }
 };

 AVFilter ff_vf_interleave = {
     .name        = "interleave",
     .description = NULL_IF_CONFIG_SMALL("Temporally interleave video inputs."),
     .priv_size   = sizeof(InterleaveContext),
     .init        = init,
     .uninit      = uninit,
     .outputs     = interleave_outputs,
     .priv_class  = &interleave_class,
     .flags       = AVFILTER_FLAG_DYNAMIC_INPUTS,
 };

 #endif

 #if CONFIG_AINTERLEAVE_FILTER

 DEFINE_OPTIONS(ainterleave, AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM);
 AVFILTER_DEFINE_CLASS(ainterleave);

 static const AVFilterPad ainterleave_outputs[] = {
     {
         .name          = "default",
         .type          = AVMEDIA_TYPE_AUDIO,
         .config_props  = config_output,
         .request_frame = request_frame,
     },
     { NULL }
 };

 AVFilter ff_af_ainterleave = {
     .name        = "ainterleave",
     .description = NULL_IF_CONFIG_SMALL("Temporally interleave audio inputs."),
     .priv_size   = sizeof(InterleaveContext),
     .init        = init,
     .uninit      = uninit,
     .outputs     = ainterleave_outputs,
     .priv_class  = &ainterleave_class,
     .flags       = AVFILTER_FLAG_DYNAMIC_INPUTS,
 };

 #endif
	/*
	* Copyright (c) 2013 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
	* audio and video interleaver
	*/

	#include "libavutil/avassert.h"
	#include "libavutil/avstring.h"
	#include "libavutil/opt.h"

	#define FF_INTERNAL_FIELDS 1
	#include "framequeue.h"

	#include "avfilter.h"
	#include "bufferqueue.h"
	#include "formats.h"
	#include "internal.h"
	#include "audio.h"
	#include "video.h"

	typedef struct InterleaveContext {
	const AVClass *class;
	int nb_inputs;
	struct FFBufQueue *queues;
	} InterleaveContext;

	#define OFFSET(x) offsetof(InterleaveContext, x)

	#define DEFINE_OPTIONS(filt_name, flags_) \
	static const AVOption filt_name##_options[] = { \
	{ "nb_inputs", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64 = 2}, 1, INT_MAX, .flags = flags_ }, \
	{ "n", "set number of inputs", OFFSET(nb_inputs), AV_OPT_TYPE_INT, {.i64 = 2}, 1, INT_MAX, .flags = flags_ }, \
	{ NULL } \
	}

	inline static int push_frame(AVFilterContext *ctx)
	{
	InterleaveContext *s = ctx->priv;
	AVFrame *frame;
	int i, queue_idx = -1;
	int64_t pts_min = INT64_MAX;

	/* look for oldest frame */
	for (i = 0; i < ctx->nb_inputs; i++) {
	struct FFBufQueue *q = &s->queues[i];

	if (!q->available && !ctx->inputs[i]->status_out)
	return 0;
	if (q->available) {
	frame = ff_bufqueue_peek(q, 0);
	if (frame->pts < pts_min) {
	pts_min = frame->pts;
	queue_idx = i;
	}
	}
	}

	/* all inputs are closed */
	if (queue_idx < 0)
	return AVERROR_EOF;

	frame = ff_bufqueue_get(&s->queues[queue_idx]);
	av_log(ctx, AV_LOG_DEBUG, "queue:%d -> frame time:%f\n",
	queue_idx, frame->pts * av_q2d(AV_TIME_BASE_Q));
	return ff_filter_frame(ctx->outputs[0], frame);
	}

	static int filter_frame(AVFilterLink inlink, AVFrame frame)
	{
	AVFilterContext *ctx = inlink->dst;
	InterleaveContext *s = ctx->priv;
	unsigned in_no = FF_INLINK_IDX(inlink);

	if (frame->pts == AV_NOPTS_VALUE) {
	av_log(ctx, AV_LOG_WARNING,
	"NOPTS value for input frame cannot be accepted, frame discarded\n");
	av_frame_free(&frame);
	return AVERROR_INVALIDDATA;
	}

	/* queue frame */
	frame->pts = av_rescale_q(frame->pts, inlink->time_base, AV_TIME_BASE_Q);
	av_log(ctx, AV_LOG_DEBUG, "frame pts:%f -> queue idx:%d available:%d\n",
	frame->pts * av_q2d(AV_TIME_BASE_Q), in_no, s->queues[in_no].available);
	ff_bufqueue_add(ctx, &s->queues[in_no], frame);

	return push_frame(ctx);
	}

	static av_cold int init(AVFilterContext *ctx)
	{
	InterleaveContext *s = ctx->priv;
	const AVFilterPad *outpad = &ctx->filter->outputs[0];
	int i, ret;

	s->queues = av_calloc(s->nb_inputs, sizeof(s->queues[0]));
	if (!s->queues)
	return AVERROR(ENOMEM);

	for (i = 0; i < s->nb_inputs; i++) {
	AVFilterPad inpad = { 0 };

	inpad.name = av_asprintf("input%d", i);
	if (!inpad.name)
	return AVERROR(ENOMEM);
	inpad.type = outpad->type;
	inpad.filter_frame = filter_frame;

	switch (outpad->type) {
	case AVMEDIA_TYPE_VIDEO:
	inpad.get_video_buffer = ff_null_get_video_buffer; break;
	case AVMEDIA_TYPE_AUDIO:
	inpad.get_audio_buffer = ff_null_get_audio_buffer; break;
	default:
	av_assert0(0);
	}
	if ((ret = ff_insert_inpad(ctx, i, &inpad)) < 0) {
	av_freep(&inpad.name);
	return ret;
	}
	}

	return 0;
	}

	static av_cold void uninit(AVFilterContext *ctx)
	{
	InterleaveContext *s = ctx->priv;
	int i;

	for (i = 0; i < ctx->nb_inputs; i++) {
	ff_bufqueue_discard_all(&s->queues[i]);
	av_freep(&s->queues[i]);
	av_freep(&ctx->input_pads[i].name);
	}
	}

	static int config_output(AVFilterLink *outlink)
	{
	AVFilterContext *ctx = outlink->src;
	AVFilterLink *inlink0 = ctx->inputs[0];
	int i;

	if (outlink->type == AVMEDIA_TYPE_VIDEO) {
	outlink->time_base = AV_TIME_BASE_Q;
	outlink->w = inlink0->w;
	outlink->h = inlink0->h;
	outlink->sample_aspect_ratio = inlink0->sample_aspect_ratio;
	outlink->format = inlink0->format;
	outlink->frame_rate = (AVRational) {1, 0};
	for (i = 1; i < ctx->nb_inputs; i++) {
	AVFilterLink *inlink = ctx->inputs[i];

	if (outlink->w != inlink->w \|\|
	outlink->h != inlink->h \|\|
	outlink->sample_aspect_ratio.num != inlink->sample_aspect_ratio.num \|\|
	outlink->sample_aspect_ratio.den != inlink->sample_aspect_ratio.den) {
	av_log(ctx, AV_LOG_ERROR, "Parameters for input link %s "
	"(size %dx%d, SAR %d:%d) do not match the corresponding "
	"output link parameters (%dx%d, SAR %d:%d)\n",
	ctx->input_pads[i].name, inlink->w, inlink->h,
	inlink->sample_aspect_ratio.num,
	inlink->sample_aspect_ratio.den,
	outlink->w, outlink->h,
	outlink->sample_aspect_ratio.num,
	outlink->sample_aspect_ratio.den);
	return AVERROR(EINVAL);
	}
	}
	}
	return 0;
	}

	static int request_frame(AVFilterLink *outlink)
	{
	AVFilterContext *ctx = outlink->src;
	InterleaveContext *s = ctx->priv;
	int i, ret;

	for (i = 0; i < ctx->nb_inputs; i++) {
	if (!s->queues[i].available && !ctx->inputs[i]->status_out) {
	ret = ff_request_frame(ctx->inputs[i]);
	if (ret != AVERROR_EOF)
	return ret;
	}
	}

	return push_frame(ctx);
	}

	#if CONFIG_INTERLEAVE_FILTER

	DEFINE_OPTIONS(interleave, AV_OPT_FLAG_VIDEO_PARAM\|AV_OPT_FLAG_FILTERING_PARAM);
	AVFILTER_DEFINE_CLASS(interleave);

	static const AVFilterPad interleave_outputs[] = {
	{
	.name = "default",
	.type = AVMEDIA_TYPE_VIDEO,
	.config_props = config_output,
	.request_frame = request_frame,
	},
	{ NULL }
	};

	AVFilter ff_vf_interleave = {
	.name = "interleave",
	.description = NULL_IF_CONFIG_SMALL("Temporally interleave video inputs."),
	.priv_size = sizeof(InterleaveContext),
	.init = init,
	.uninit = uninit,
	.outputs = interleave_outputs,
	.priv_class = &interleave_class,
	.flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
	};

	#endif

	#if CONFIG_AINTERLEAVE_FILTER

	DEFINE_OPTIONS(ainterleave, AV_OPT_FLAG_AUDIO_PARAM\|AV_OPT_FLAG_FILTERING_PARAM);
	AVFILTER_DEFINE_CLASS(ainterleave);

	static const AVFilterPad ainterleave_outputs[] = {
	{
	.name = "default",
	.type = AVMEDIA_TYPE_AUDIO,
	.config_props = config_output,
	.request_frame = request_frame,
	},
	{ NULL }
	};

	AVFilter ff_af_ainterleave = {
	.name = "ainterleave",
	.description = NULL_IF_CONFIG_SMALL("Temporally interleave audio inputs."),
	.priv_size = sizeof(InterleaveContext),
	.init = init,
	.uninit = uninit,
	.outputs = ainterleave_outputs,
	.priv_class = &ainterleave_class,
	.flags = AVFILTER_FLAG_DYNAMIC_INPUTS,
	};

	#endif