From 8f1edc73a885055b7d03292b6457d858bbf377ba Mon Sep 17 00:00:00 2001 From: Stefano Sabatini Date: Fri, 6 Dec 2013 10:33:55 +0100 Subject: lavfi: rename asrc_aevalsrc.c to aeval.c The file now contains both source and filter, the new name looks more appropriate. --- libavfilter/Makefile | 4 +- libavfilter/aeval.c | 466 ++++++++++++++++++++++++++++++++++++++++++++ libavfilter/asrc_aevalsrc.c | 466 -------------------------------------------- 3 files changed, 468 insertions(+), 468 deletions(-) create mode 100644 libavfilter/aeval.c delete mode 100644 libavfilter/asrc_aevalsrc.c diff --git a/libavfilter/Makefile b/libavfilter/Makefile index 1b2375b73f..3d587fe421 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -53,7 +53,7 @@ OBJS-$(CONFIG_AVCODEC) += avcodec.o OBJS-$(CONFIG_ACONVERT_FILTER) += af_aconvert.o OBJS-$(CONFIG_ADELAY_FILTER) += af_adelay.o OBJS-$(CONFIG_AECHO_FILTER) += af_aecho.o -OBJS-$(CONFIG_AEVAL_FILTER) += asrc_aevalsrc.o +OBJS-$(CONFIG_AEVAL_FILTER) += aeval.o OBJS-$(CONFIG_AFADE_FILTER) += af_afade.o OBJS-$(CONFIG_AFORMAT_FILTER) += af_aformat.o OBJS-$(CONFIG_AINTERLEAVE_FILTER) += f_interleave.o @@ -101,7 +101,7 @@ OBJS-$(CONFIG_TREBLE_FILTER) += af_biquads.o OBJS-$(CONFIG_VOLUME_FILTER) += af_volume.o OBJS-$(CONFIG_VOLUMEDETECT_FILTER) += af_volumedetect.o -OBJS-$(CONFIG_AEVALSRC_FILTER) += asrc_aevalsrc.o +OBJS-$(CONFIG_AEVALSRC_FILTER) += aeval.o OBJS-$(CONFIG_ANULLSRC_FILTER) += asrc_anullsrc.o OBJS-$(CONFIG_FLITE_FILTER) += asrc_flite.o OBJS-$(CONFIG_SINE_FILTER) += asrc_sine.o diff --git a/libavfilter/aeval.c b/libavfilter/aeval.c new file mode 100644 index 0000000000..3a05fb016e --- /dev/null +++ b/libavfilter/aeval.c @@ -0,0 +1,466 @@ +/* + * 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 + * eval audio source + */ + +#include "libavutil/avassert.h" +#include "libavutil/avstring.h" +#include "libavutil/channel_layout.h" +#include "libavutil/eval.h" +#include "libavutil/opt.h" +#include "libavutil/parseutils.h" +#include "avfilter.h" +#include "audio.h" +#include "internal.h" + +static const char * const var_names[] = { + "ch", ///< the value of the current channel + "n", ///< number of frame + "nb_in_channels", + "nb_out_channels", + "t", ///< timestamp expressed in seconds + "s", ///< sample rate + NULL +}; + +enum var_name { + VAR_CH, + VAR_N, + VAR_NB_IN_CHANNELS, + VAR_NB_OUT_CHANNELS, + VAR_T, + VAR_S, + VAR_VARS_NB +}; + +typedef struct { + const AVClass *class; + char *sample_rate_str; + int sample_rate; + int64_t chlayout; + char *chlayout_str; + int nb_channels; ///< number of output channels + int nb_in_channels; ///< number of input channels + int same_chlayout; ///< set output as input channel layout + int64_t pts; + AVExpr **expr; + char *exprs; + int nb_samples; ///< number of samples per requested frame + int64_t duration; + uint64_t n; + double var_values[VAR_VARS_NB]; + double *channel_values; + int64_t out_channel_layout; +} EvalContext; + +static double val(void *priv, double ch) +{ + EvalContext *eval = priv; + return eval->channel_values[FFMIN((int)ch, eval->nb_in_channels-1)]; +} + +static double (* const aeval_func1[])(void *, double) = { val, NULL }; +static const char * const aeval_func1_names[] = { "val", NULL }; + +#define OFFSET(x) offsetof(EvalContext, x) +#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM + +static const AVOption aevalsrc_options[]= { + { "exprs", "set the '|'-separated list of channels expressions", OFFSET(exprs), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = FLAGS }, + { "nb_samples", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64 = 1024}, 0, INT_MAX, FLAGS }, + { "n", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64 = 1024}, 0, INT_MAX, FLAGS }, + { "sample_rate", "set the sample rate", OFFSET(sample_rate_str), AV_OPT_TYPE_STRING, {.str = "44100"}, CHAR_MIN, CHAR_MAX, FLAGS }, + { "s", "set the sample rate", OFFSET(sample_rate_str), AV_OPT_TYPE_STRING, {.str = "44100"}, CHAR_MIN, CHAR_MAX, FLAGS }, + { "duration", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = -1}, -1, INT64_MAX, FLAGS }, + { "d", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = -1}, -1, INT64_MAX, FLAGS }, + { "channel_layout", "set channel layout", OFFSET(chlayout_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS }, + { "c", "set channel layout", OFFSET(chlayout_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS }, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(aevalsrc); + +static int parse_channel_expressions(AVFilterContext *ctx, + int expected_nb_channels) +{ + EvalContext *eval = ctx->priv; + char *args1 = av_strdup(eval->exprs); + char *expr, *last_expr, *buf; + double (* const *func1)(void *, double) = NULL; + const char * const *func1_names = NULL; + int i, ret = 0; + + if (!args1) + return AVERROR(ENOMEM); + + if (!eval->exprs) { + av_log(ctx, AV_LOG_ERROR, "Channels expressions list is empty\n"); + return AVERROR(EINVAL); + } + + if (!strcmp(ctx->filter->name, "aeval")) { + func1 = aeval_func1; + func1_names = aeval_func1_names; + } + +#define ADD_EXPRESSION(expr_) do { \ + if (!av_dynarray2_add((void **)&eval->expr, &eval->nb_channels, \ + sizeof(*eval->expr), NULL)) { \ + ret = AVERROR(ENOMEM); \ + goto end; \ + } \ + eval->expr[eval->nb_channels-1] = NULL; \ + ret = av_expr_parse(&eval->expr[eval->nb_channels - 1], expr_, \ + var_names, func1_names, func1, \ + NULL, NULL, 0, ctx); \ + if (ret < 0) \ + goto end; \ + } while (0) + + /* reset expressions */ + for (i = 0; i < eval->nb_channels; i++) { + av_expr_free(eval->expr[i]); + eval->expr[i] = NULL; + } + av_freep(&eval->expr); + eval->nb_channels = 0; + + buf = args1; + while (expr = av_strtok(buf, "|", &buf)) { + ADD_EXPRESSION(expr); + last_expr = expr; + } + + if (expected_nb_channels > eval->nb_channels) + for (i = eval->nb_channels; i < expected_nb_channels; i++) + ADD_EXPRESSION(last_expr); + + if (expected_nb_channels > 0 && eval->nb_channels != expected_nb_channels) { + av_log(ctx, AV_LOG_ERROR, + "Mismatch between the specified number of channel expressions '%d' " + "and the number of expected output channels '%d' for the specified channel layout\n", + eval->nb_channels, expected_nb_channels); + ret = AVERROR(EINVAL); + goto end; + } + +end: + av_free(args1); + return ret; +} + +static av_cold int init(AVFilterContext *ctx) +{ + EvalContext *eval = ctx->priv; + int ret; + + if (eval->chlayout_str) { + if (!strcmp(eval->chlayout_str, "same") && !strcmp(ctx->filter->name, "aeval")) { + eval->same_chlayout = 1; + } else { + ret = ff_parse_channel_layout(&eval->chlayout, NULL, eval->chlayout_str, ctx); + if (ret < 0) + return ret; + + ret = parse_channel_expressions(ctx, av_get_channel_layout_nb_channels(eval->chlayout)); + if (ret < 0) + return ret; + } + } else { + /* guess channel layout from nb expressions/channels */ + if ((ret = parse_channel_expressions(ctx, -1)) < 0) + return ret; + + eval->chlayout = av_get_default_channel_layout(eval->nb_channels); + if (!eval->chlayout && eval->nb_channels <= 0) { + av_log(ctx, AV_LOG_ERROR, "Invalid number of channels '%d' provided\n", + eval->nb_channels); + return AVERROR(EINVAL); + } + } + + if (eval->sample_rate_str) + if ((ret = ff_parse_sample_rate(&eval->sample_rate, eval->sample_rate_str, ctx))) + return ret; + eval->n = 0; + + return ret; +} + +static av_cold void uninit(AVFilterContext *ctx) +{ + EvalContext *eval = ctx->priv; + int i; + + for (i = 0; i < eval->nb_channels; i++) { + av_expr_free(eval->expr[i]); + eval->expr[i] = NULL; + } + av_freep(&eval->expr); +} + +static int config_props(AVFilterLink *outlink) +{ + EvalContext *eval = outlink->src->priv; + char buf[128]; + + outlink->time_base = (AVRational){1, eval->sample_rate}; + outlink->sample_rate = eval->sample_rate; + + eval->var_values[VAR_S] = eval->sample_rate; + eval->var_values[VAR_NB_IN_CHANNELS] = NAN; + eval->var_values[VAR_NB_OUT_CHANNELS] = outlink->channels; + + av_get_channel_layout_string(buf, sizeof(buf), 0, eval->chlayout); + + av_log(outlink->src, AV_LOG_VERBOSE, + "sample_rate:%d chlayout:%s duration:%"PRId64"\n", + eval->sample_rate, buf, eval->duration); + + return 0; +} + +static int query_formats(AVFilterContext *ctx) +{ + EvalContext *eval = ctx->priv; + static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_DBLP, AV_SAMPLE_FMT_NONE }; + int64_t chlayouts[] = { eval->chlayout ? eval->chlayout : FF_COUNT2LAYOUT(eval->nb_channels) , -1 }; + int sample_rates[] = { eval->sample_rate, -1 }; + + ff_set_common_formats (ctx, ff_make_format_list(sample_fmts)); + ff_set_common_channel_layouts(ctx, avfilter_make_format64_list(chlayouts)); + ff_set_common_samplerates(ctx, ff_make_format_list(sample_rates)); + + return 0; +} + +static int request_frame(AVFilterLink *outlink) +{ + EvalContext *eval = outlink->src->priv; + AVFrame *samplesref; + int i, j; + int64_t t = av_rescale(eval->n, AV_TIME_BASE, eval->sample_rate); + + if (eval->duration >= 0 && t >= eval->duration) + return AVERROR_EOF; + + samplesref = ff_get_audio_buffer(outlink, eval->nb_samples); + if (!samplesref) + return AVERROR(ENOMEM); + + /* evaluate expression for each single sample and for each channel */ + for (i = 0; i < eval->nb_samples; i++, eval->n++) { + eval->var_values[VAR_N] = eval->n; + eval->var_values[VAR_T] = eval->var_values[VAR_N] * (double)1/eval->sample_rate; + + for (j = 0; j < eval->nb_channels; j++) { + *((double *) samplesref->extended_data[j] + i) = + av_expr_eval(eval->expr[j], eval->var_values, NULL); + } + } + + samplesref->pts = eval->pts; + samplesref->sample_rate = eval->sample_rate; + eval->pts += eval->nb_samples; + + return ff_filter_frame(outlink, samplesref); +} + +#if CONFIG_AEVALSRC_FILTER +static const AVFilterPad aevalsrc_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_AUDIO, + .config_props = config_props, + .request_frame = request_frame, + }, + { NULL } +}; + +AVFilter ff_asrc_aevalsrc = { + .name = "aevalsrc", + .description = NULL_IF_CONFIG_SMALL("Generate an audio signal generated by an expression."), + .query_formats = query_formats, + .init = init, + .uninit = uninit, + .priv_size = sizeof(EvalContext), + .inputs = NULL, + .outputs = aevalsrc_outputs, + .priv_class = &aevalsrc_class, +}; + +#endif /* CONFIG_AEVALSRC_FILTER */ + +#define OFFSET(x) offsetof(EvalContext, x) +#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM + +static const AVOption aeval_options[]= { + { "exprs", "set the '|'-separated list of channels expressions", OFFSET(exprs), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = FLAGS }, + { "channel_layout", "set channel layout", OFFSET(chlayout_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS }, + { "c", "set channel layout", OFFSET(chlayout_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS }, + { NULL } +}; + +AVFILTER_DEFINE_CLASS(aeval); + +static int aeval_query_formats(AVFilterContext *ctx) +{ + AVFilterFormats *formats = NULL; + AVFilterChannelLayouts *layouts; + AVFilterLink *inlink = ctx->inputs[0]; + AVFilterLink *outlink = ctx->outputs[0]; + EvalContext *eval = ctx->priv; + static const enum AVSampleFormat sample_fmts[] = { + AV_SAMPLE_FMT_DBLP, AV_SAMPLE_FMT_NONE + }; + + // inlink supports any channel layout + layouts = ff_all_channel_counts(); + ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts); + + if (eval->same_chlayout) { + layouts = ff_all_channel_counts(); + if (!layouts) + return AVERROR(ENOMEM); + ff_set_common_channel_layouts(ctx, layouts); + } else { + // outlink supports only requested output channel layout + layouts = NULL; + ff_add_channel_layout(&layouts, + eval->out_channel_layout ? eval->out_channel_layout : + FF_COUNT2LAYOUT(eval->nb_channels)); + ff_channel_layouts_ref(layouts, &outlink->in_channel_layouts); + } + + formats = ff_make_format_list(sample_fmts); + if (!formats) + return AVERROR(ENOMEM); + ff_set_common_formats(ctx, formats); + + formats = ff_all_samplerates(); + if (!formats) + return AVERROR(ENOMEM); + ff_set_common_samplerates(ctx, formats); + + return 0; +} + +static int aeval_config_output(AVFilterLink *outlink) +{ + AVFilterContext *ctx = outlink->src; + EvalContext *eval = ctx->priv; + AVFilterLink *inlink = ctx->inputs[0]; + int ret; + + if (eval->same_chlayout) { + eval->chlayout = inlink->channel_layout; + + if ((ret = parse_channel_expressions(ctx, inlink->channels)) < 0) + return ret; + } + + eval->n = 0; + eval->nb_in_channels = eval->var_values[VAR_NB_IN_CHANNELS] = inlink->channels; + eval->var_values[VAR_NB_OUT_CHANNELS] = outlink->channels; + eval->var_values[VAR_S] = inlink->sample_rate; + eval->var_values[VAR_T] = NAN; + + eval->channel_values = av_realloc_f(eval->channel_values, + inlink->channels, sizeof(*eval->channel_values)); + if (!eval->channel_values) + return AVERROR(ENOMEM); + + return 0; +} + +#define TS2T(ts, tb) ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts)*av_q2d(tb)) + +static int filter_frame(AVFilterLink *inlink, AVFrame *in) +{ + EvalContext *eval = inlink->dst->priv; + AVFilterLink *outlink = inlink->dst->outputs[0]; + int nb_samples = in->nb_samples; + AVFrame *out; + double t0; + int i, j; + + /* do volume scaling in-place if input buffer is writable */ + out = ff_get_audio_buffer(outlink, nb_samples); + if (!out) + return AVERROR(ENOMEM); + av_frame_copy_props(out, in); + + t0 = TS2T(in->pts, inlink->time_base); + + /* evaluate expression for each single sample and for each channel */ + for (i = 0; i < nb_samples; i++, eval->n++) { + eval->var_values[VAR_N] = eval->n; + eval->var_values[VAR_T] = t0 + i * (double)1/inlink->sample_rate; + + for (j = 0; j < inlink->channels; j++) + eval->channel_values[j] = *((double *) in->extended_data[j] + i); + + for (j = 0; j < outlink->channels; j++) { + eval->var_values[VAR_CH] = j; + *((double *) out->extended_data[j] + i) = + av_expr_eval(eval->expr[j], eval->var_values, eval); + } + } + + av_frame_free(&in); + return ff_filter_frame(outlink, out); +} + +#if CONFIG_AEVAL_FILTER + +static const AVFilterPad aeval_inputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_AUDIO, + .filter_frame = filter_frame, + }, + { NULL } +}; + +static const AVFilterPad aeval_outputs[] = { + { + .name = "default", + .type = AVMEDIA_TYPE_AUDIO, + .config_props = aeval_config_output, + }, + { NULL } +}; + +AVFilter ff_af_aeval = { + .name = "aeval", + .description = NULL_IF_CONFIG_SMALL("Filter audio signal according to a specified expression."), + .query_formats = aeval_query_formats, + .init = init, + .uninit = uninit, + .priv_size = sizeof(EvalContext), + .inputs = aeval_inputs, + .outputs = aeval_outputs, + .priv_class = &aeval_class, +}; + +#endif /* CONFIG_AEVAL_FILTER */ diff --git a/libavfilter/asrc_aevalsrc.c b/libavfilter/asrc_aevalsrc.c deleted file mode 100644 index 3a05fb016e..0000000000 --- a/libavfilter/asrc_aevalsrc.c +++ /dev/null @@ -1,466 +0,0 @@ -/* - * 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 - * eval audio source - */ - -#include "libavutil/avassert.h" -#include "libavutil/avstring.h" -#include "libavutil/channel_layout.h" -#include "libavutil/eval.h" -#include "libavutil/opt.h" -#include "libavutil/parseutils.h" -#include "avfilter.h" -#include "audio.h" -#include "internal.h" - -static const char * const var_names[] = { - "ch", ///< the value of the current channel - "n", ///< number of frame - "nb_in_channels", - "nb_out_channels", - "t", ///< timestamp expressed in seconds - "s", ///< sample rate - NULL -}; - -enum var_name { - VAR_CH, - VAR_N, - VAR_NB_IN_CHANNELS, - VAR_NB_OUT_CHANNELS, - VAR_T, - VAR_S, - VAR_VARS_NB -}; - -typedef struct { - const AVClass *class; - char *sample_rate_str; - int sample_rate; - int64_t chlayout; - char *chlayout_str; - int nb_channels; ///< number of output channels - int nb_in_channels; ///< number of input channels - int same_chlayout; ///< set output as input channel layout - int64_t pts; - AVExpr **expr; - char *exprs; - int nb_samples; ///< number of samples per requested frame - int64_t duration; - uint64_t n; - double var_values[VAR_VARS_NB]; - double *channel_values; - int64_t out_channel_layout; -} EvalContext; - -static double val(void *priv, double ch) -{ - EvalContext *eval = priv; - return eval->channel_values[FFMIN((int)ch, eval->nb_in_channels-1)]; -} - -static double (* const aeval_func1[])(void *, double) = { val, NULL }; -static const char * const aeval_func1_names[] = { "val", NULL }; - -#define OFFSET(x) offsetof(EvalContext, x) -#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM - -static const AVOption aevalsrc_options[]= { - { "exprs", "set the '|'-separated list of channels expressions", OFFSET(exprs), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = FLAGS }, - { "nb_samples", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64 = 1024}, 0, INT_MAX, FLAGS }, - { "n", "set the number of samples per requested frame", OFFSET(nb_samples), AV_OPT_TYPE_INT, {.i64 = 1024}, 0, INT_MAX, FLAGS }, - { "sample_rate", "set the sample rate", OFFSET(sample_rate_str), AV_OPT_TYPE_STRING, {.str = "44100"}, CHAR_MIN, CHAR_MAX, FLAGS }, - { "s", "set the sample rate", OFFSET(sample_rate_str), AV_OPT_TYPE_STRING, {.str = "44100"}, CHAR_MIN, CHAR_MAX, FLAGS }, - { "duration", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = -1}, -1, INT64_MAX, FLAGS }, - { "d", "set audio duration", OFFSET(duration), AV_OPT_TYPE_DURATION, {.i64 = -1}, -1, INT64_MAX, FLAGS }, - { "channel_layout", "set channel layout", OFFSET(chlayout_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS }, - { "c", "set channel layout", OFFSET(chlayout_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS }, - { NULL } -}; - -AVFILTER_DEFINE_CLASS(aevalsrc); - -static int parse_channel_expressions(AVFilterContext *ctx, - int expected_nb_channels) -{ - EvalContext *eval = ctx->priv; - char *args1 = av_strdup(eval->exprs); - char *expr, *last_expr, *buf; - double (* const *func1)(void *, double) = NULL; - const char * const *func1_names = NULL; - int i, ret = 0; - - if (!args1) - return AVERROR(ENOMEM); - - if (!eval->exprs) { - av_log(ctx, AV_LOG_ERROR, "Channels expressions list is empty\n"); - return AVERROR(EINVAL); - } - - if (!strcmp(ctx->filter->name, "aeval")) { - func1 = aeval_func1; - func1_names = aeval_func1_names; - } - -#define ADD_EXPRESSION(expr_) do { \ - if (!av_dynarray2_add((void **)&eval->expr, &eval->nb_channels, \ - sizeof(*eval->expr), NULL)) { \ - ret = AVERROR(ENOMEM); \ - goto end; \ - } \ - eval->expr[eval->nb_channels-1] = NULL; \ - ret = av_expr_parse(&eval->expr[eval->nb_channels - 1], expr_, \ - var_names, func1_names, func1, \ - NULL, NULL, 0, ctx); \ - if (ret < 0) \ - goto end; \ - } while (0) - - /* reset expressions */ - for (i = 0; i < eval->nb_channels; i++) { - av_expr_free(eval->expr[i]); - eval->expr[i] = NULL; - } - av_freep(&eval->expr); - eval->nb_channels = 0; - - buf = args1; - while (expr = av_strtok(buf, "|", &buf)) { - ADD_EXPRESSION(expr); - last_expr = expr; - } - - if (expected_nb_channels > eval->nb_channels) - for (i = eval->nb_channels; i < expected_nb_channels; i++) - ADD_EXPRESSION(last_expr); - - if (expected_nb_channels > 0 && eval->nb_channels != expected_nb_channels) { - av_log(ctx, AV_LOG_ERROR, - "Mismatch between the specified number of channel expressions '%d' " - "and the number of expected output channels '%d' for the specified channel layout\n", - eval->nb_channels, expected_nb_channels); - ret = AVERROR(EINVAL); - goto end; - } - -end: - av_free(args1); - return ret; -} - -static av_cold int init(AVFilterContext *ctx) -{ - EvalContext *eval = ctx->priv; - int ret; - - if (eval->chlayout_str) { - if (!strcmp(eval->chlayout_str, "same") && !strcmp(ctx->filter->name, "aeval")) { - eval->same_chlayout = 1; - } else { - ret = ff_parse_channel_layout(&eval->chlayout, NULL, eval->chlayout_str, ctx); - if (ret < 0) - return ret; - - ret = parse_channel_expressions(ctx, av_get_channel_layout_nb_channels(eval->chlayout)); - if (ret < 0) - return ret; - } - } else { - /* guess channel layout from nb expressions/channels */ - if ((ret = parse_channel_expressions(ctx, -1)) < 0) - return ret; - - eval->chlayout = av_get_default_channel_layout(eval->nb_channels); - if (!eval->chlayout && eval->nb_channels <= 0) { - av_log(ctx, AV_LOG_ERROR, "Invalid number of channels '%d' provided\n", - eval->nb_channels); - return AVERROR(EINVAL); - } - } - - if (eval->sample_rate_str) - if ((ret = ff_parse_sample_rate(&eval->sample_rate, eval->sample_rate_str, ctx))) - return ret; - eval->n = 0; - - return ret; -} - -static av_cold void uninit(AVFilterContext *ctx) -{ - EvalContext *eval = ctx->priv; - int i; - - for (i = 0; i < eval->nb_channels; i++) { - av_expr_free(eval->expr[i]); - eval->expr[i] = NULL; - } - av_freep(&eval->expr); -} - -static int config_props(AVFilterLink *outlink) -{ - EvalContext *eval = outlink->src->priv; - char buf[128]; - - outlink->time_base = (AVRational){1, eval->sample_rate}; - outlink->sample_rate = eval->sample_rate; - - eval->var_values[VAR_S] = eval->sample_rate; - eval->var_values[VAR_NB_IN_CHANNELS] = NAN; - eval->var_values[VAR_NB_OUT_CHANNELS] = outlink->channels; - - av_get_channel_layout_string(buf, sizeof(buf), 0, eval->chlayout); - - av_log(outlink->src, AV_LOG_VERBOSE, - "sample_rate:%d chlayout:%s duration:%"PRId64"\n", - eval->sample_rate, buf, eval->duration); - - return 0; -} - -static int query_formats(AVFilterContext *ctx) -{ - EvalContext *eval = ctx->priv; - static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_DBLP, AV_SAMPLE_FMT_NONE }; - int64_t chlayouts[] = { eval->chlayout ? eval->chlayout : FF_COUNT2LAYOUT(eval->nb_channels) , -1 }; - int sample_rates[] = { eval->sample_rate, -1 }; - - ff_set_common_formats (ctx, ff_make_format_list(sample_fmts)); - ff_set_common_channel_layouts(ctx, avfilter_make_format64_list(chlayouts)); - ff_set_common_samplerates(ctx, ff_make_format_list(sample_rates)); - - return 0; -} - -static int request_frame(AVFilterLink *outlink) -{ - EvalContext *eval = outlink->src->priv; - AVFrame *samplesref; - int i, j; - int64_t t = av_rescale(eval->n, AV_TIME_BASE, eval->sample_rate); - - if (eval->duration >= 0 && t >= eval->duration) - return AVERROR_EOF; - - samplesref = ff_get_audio_buffer(outlink, eval->nb_samples); - if (!samplesref) - return AVERROR(ENOMEM); - - /* evaluate expression for each single sample and for each channel */ - for (i = 0; i < eval->nb_samples; i++, eval->n++) { - eval->var_values[VAR_N] = eval->n; - eval->var_values[VAR_T] = eval->var_values[VAR_N] * (double)1/eval->sample_rate; - - for (j = 0; j < eval->nb_channels; j++) { - *((double *) samplesref->extended_data[j] + i) = - av_expr_eval(eval->expr[j], eval->var_values, NULL); - } - } - - samplesref->pts = eval->pts; - samplesref->sample_rate = eval->sample_rate; - eval->pts += eval->nb_samples; - - return ff_filter_frame(outlink, samplesref); -} - -#if CONFIG_AEVALSRC_FILTER -static const AVFilterPad aevalsrc_outputs[] = { - { - .name = "default", - .type = AVMEDIA_TYPE_AUDIO, - .config_props = config_props, - .request_frame = request_frame, - }, - { NULL } -}; - -AVFilter ff_asrc_aevalsrc = { - .name = "aevalsrc", - .description = NULL_IF_CONFIG_SMALL("Generate an audio signal generated by an expression."), - .query_formats = query_formats, - .init = init, - .uninit = uninit, - .priv_size = sizeof(EvalContext), - .inputs = NULL, - .outputs = aevalsrc_outputs, - .priv_class = &aevalsrc_class, -}; - -#endif /* CONFIG_AEVALSRC_FILTER */ - -#define OFFSET(x) offsetof(EvalContext, x) -#define FLAGS AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_FILTERING_PARAM - -static const AVOption aeval_options[]= { - { "exprs", "set the '|'-separated list of channels expressions", OFFSET(exprs), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = FLAGS }, - { "channel_layout", "set channel layout", OFFSET(chlayout_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS }, - { "c", "set channel layout", OFFSET(chlayout_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, FLAGS }, - { NULL } -}; - -AVFILTER_DEFINE_CLASS(aeval); - -static int aeval_query_formats(AVFilterContext *ctx) -{ - AVFilterFormats *formats = NULL; - AVFilterChannelLayouts *layouts; - AVFilterLink *inlink = ctx->inputs[0]; - AVFilterLink *outlink = ctx->outputs[0]; - EvalContext *eval = ctx->priv; - static const enum AVSampleFormat sample_fmts[] = { - AV_SAMPLE_FMT_DBLP, AV_SAMPLE_FMT_NONE - }; - - // inlink supports any channel layout - layouts = ff_all_channel_counts(); - ff_channel_layouts_ref(layouts, &inlink->out_channel_layouts); - - if (eval->same_chlayout) { - layouts = ff_all_channel_counts(); - if (!layouts) - return AVERROR(ENOMEM); - ff_set_common_channel_layouts(ctx, layouts); - } else { - // outlink supports only requested output channel layout - layouts = NULL; - ff_add_channel_layout(&layouts, - eval->out_channel_layout ? eval->out_channel_layout : - FF_COUNT2LAYOUT(eval->nb_channels)); - ff_channel_layouts_ref(layouts, &outlink->in_channel_layouts); - } - - formats = ff_make_format_list(sample_fmts); - if (!formats) - return AVERROR(ENOMEM); - ff_set_common_formats(ctx, formats); - - formats = ff_all_samplerates(); - if (!formats) - return AVERROR(ENOMEM); - ff_set_common_samplerates(ctx, formats); - - return 0; -} - -static int aeval_config_output(AVFilterLink *outlink) -{ - AVFilterContext *ctx = outlink->src; - EvalContext *eval = ctx->priv; - AVFilterLink *inlink = ctx->inputs[0]; - int ret; - - if (eval->same_chlayout) { - eval->chlayout = inlink->channel_layout; - - if ((ret = parse_channel_expressions(ctx, inlink->channels)) < 0) - return ret; - } - - eval->n = 0; - eval->nb_in_channels = eval->var_values[VAR_NB_IN_CHANNELS] = inlink->channels; - eval->var_values[VAR_NB_OUT_CHANNELS] = outlink->channels; - eval->var_values[VAR_S] = inlink->sample_rate; - eval->var_values[VAR_T] = NAN; - - eval->channel_values = av_realloc_f(eval->channel_values, - inlink->channels, sizeof(*eval->channel_values)); - if (!eval->channel_values) - return AVERROR(ENOMEM); - - return 0; -} - -#define TS2T(ts, tb) ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts)*av_q2d(tb)) - -static int filter_frame(AVFilterLink *inlink, AVFrame *in) -{ - EvalContext *eval = inlink->dst->priv; - AVFilterLink *outlink = inlink->dst->outputs[0]; - int nb_samples = in->nb_samples; - AVFrame *out; - double t0; - int i, j; - - /* do volume scaling in-place if input buffer is writable */ - out = ff_get_audio_buffer(outlink, nb_samples); - if (!out) - return AVERROR(ENOMEM); - av_frame_copy_props(out, in); - - t0 = TS2T(in->pts, inlink->time_base); - - /* evaluate expression for each single sample and for each channel */ - for (i = 0; i < nb_samples; i++, eval->n++) { - eval->var_values[VAR_N] = eval->n; - eval->var_values[VAR_T] = t0 + i * (double)1/inlink->sample_rate; - - for (j = 0; j < inlink->channels; j++) - eval->channel_values[j] = *((double *) in->extended_data[j] + i); - - for (j = 0; j < outlink->channels; j++) { - eval->var_values[VAR_CH] = j; - *((double *) out->extended_data[j] + i) = - av_expr_eval(eval->expr[j], eval->var_values, eval); - } - } - - av_frame_free(&in); - return ff_filter_frame(outlink, out); -} - -#if CONFIG_AEVAL_FILTER - -static const AVFilterPad aeval_inputs[] = { - { - .name = "default", - .type = AVMEDIA_TYPE_AUDIO, - .filter_frame = filter_frame, - }, - { NULL } -}; - -static const AVFilterPad aeval_outputs[] = { - { - .name = "default", - .type = AVMEDIA_TYPE_AUDIO, - .config_props = aeval_config_output, - }, - { NULL } -}; - -AVFilter ff_af_aeval = { - .name = "aeval", - .description = NULL_IF_CONFIG_SMALL("Filter audio signal according to a specified expression."), - .query_formats = aeval_query_formats, - .init = init, - .uninit = uninit, - .priv_size = sizeof(EvalContext), - .inputs = aeval_inputs, - .outputs = aeval_outputs, - .priv_class = &aeval_class, -}; - -#endif /* CONFIG_AEVAL_FILTER */ -- cgit v1.2.3