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-rw-r--r--libavfilter/af_volume.c218
1 files changed, 169 insertions, 49 deletions
diff --git a/libavfilter/af_volume.c b/libavfilter/af_volume.c
index 11d85a17eb..4809ae77dd 100644
--- a/libavfilter/af_volume.c
+++ b/libavfilter/af_volume.c
@@ -2,20 +2,20 @@
* Copyright (c) 2011 Stefano Sabatini
* Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com>
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
@@ -38,21 +38,41 @@
#include "internal.h"
#include "af_volume.h"
-static const char *precision_str[] = {
+static const char * const precision_str[] = {
"fixed", "float", "double"
};
+static const char *const var_names[] = {
+ "n", ///< frame number (starting at zero)
+ "nb_channels", ///< number of channels
+ "nb_consumed_samples", ///< number of samples consumed by the filter
+ "nb_samples", ///< number of samples in the current frame
+ "pos", ///< position in the file of the frame
+ "pts", ///< frame presentation timestamp
+ "sample_rate", ///< sample rate
+ "startpts", ///< PTS at start of stream
+ "startt", ///< time at start of stream
+ "t", ///< time in the file of the frame
+ "tb", ///< timebase
+ "volume", ///< last set value
+ NULL
+};
+
#define OFFSET(x) offsetof(VolumeContext, x)
#define A AV_OPT_FLAG_AUDIO_PARAM
-
-static const AVOption options[] = {
- { "volume", "Volume adjustment.",
- OFFSET(volume), AV_OPT_TYPE_DOUBLE, { .dbl = 1.0 }, 0, 0x7fffff, A },
- { "precision", "Mathematical precision.",
- OFFSET(precision), AV_OPT_TYPE_INT, { .i64 = PRECISION_FLOAT }, PRECISION_FIXED, PRECISION_DOUBLE, A, "precision" },
- { "fixed", "8-bit fixed-point.", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_FIXED }, INT_MIN, INT_MAX, A, "precision" },
- { "float", "32-bit floating-point.", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_FLOAT }, INT_MIN, INT_MAX, A, "precision" },
- { "double", "64-bit floating-point.", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_DOUBLE }, INT_MIN, INT_MAX, A, "precision" },
+#define F AV_OPT_FLAG_FILTERING_PARAM
+
+static const AVOption volume_options[] = {
+ { "volume", "set volume adjustment expression",
+ OFFSET(volume_expr), AV_OPT_TYPE_STRING, { .str = "1.0" }, .flags = A|F },
+ { "precision", "select mathematical precision",
+ OFFSET(precision), AV_OPT_TYPE_INT, { .i64 = PRECISION_FLOAT }, PRECISION_FIXED, PRECISION_DOUBLE, A|F, "precision" },
+ { "fixed", "select 8-bit fixed-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_FIXED }, INT_MIN, INT_MAX, A|F, "precision" },
+ { "float", "select 32-bit floating-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_FLOAT }, INT_MIN, INT_MAX, A|F, "precision" },
+ { "double", "select 64-bit floating-point", 0, AV_OPT_TYPE_CONST, { .i64 = PRECISION_DOUBLE }, INT_MIN, INT_MAX, A|F, "precision" },
+ { "eval", "specify when to evaluate expressions", OFFSET(eval_mode), AV_OPT_TYPE_INT, {.i64 = EVAL_MODE_ONCE}, 0, EVAL_MODE_NB-1, .flags = A|F, "eval" },
+ { "once", "eval volume expression once", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_ONCE}, .flags = A|F, .unit = "eval" },
+ { "frame", "eval volume expression per-frame", 0, AV_OPT_TYPE_CONST, {.i64=EVAL_MODE_FRAME}, .flags = A|F, .unit = "eval" },
{ "replaygain", "Apply replaygain side data when present",
OFFSET(replaygain), AV_OPT_TYPE_INT, { .i64 = REPLAYGAIN_DROP }, REPLAYGAIN_DROP, REPLAYGAIN_ALBUM, A, "replaygain" },
{ "drop", "replaygain side data is dropped", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_DROP }, 0, 0, A, "replaygain" },
@@ -66,29 +86,45 @@ static const AVOption options[] = {
{ NULL },
};
-static const AVClass volume_class = {
- .class_name = "volume filter",
- .item_name = av_default_item_name,
- .option = options,
- .version = LIBAVUTIL_VERSION_INT,
-};
+AVFILTER_DEFINE_CLASS(volume);
+
+static int set_expr(AVExpr **pexpr, const char *expr, void *log_ctx)
+{
+ int ret;
+ AVExpr *old = NULL;
+
+ if (*pexpr)
+ old = *pexpr;
+ ret = av_expr_parse(pexpr, expr, var_names,
+ NULL, NULL, NULL, NULL, 0, log_ctx);
+ if (ret < 0) {
+ av_log(log_ctx, AV_LOG_ERROR,
+ "Error when evaluating the volume expression '%s'\n", expr);
+ *pexpr = old;
+ return ret;
+ }
+
+ av_expr_free(old);
+ return 0;
+}
static av_cold int init(AVFilterContext *ctx)
{
VolumeContext *vol = ctx->priv;
- if (vol->precision == PRECISION_FIXED) {
- vol->volume_i = (int)(vol->volume * 256 + 0.5);
- vol->volume = vol->volume_i / 256.0;
- av_log(ctx, AV_LOG_VERBOSE, "volume:(%d/256)(%f)(%1.2fdB) precision:fixed\n",
- vol->volume_i, vol->volume, 20.0*log(vol->volume)/M_LN10);
- } else {
- av_log(ctx, AV_LOG_VERBOSE, "volume:(%f)(%1.2fdB) precision:%s\n",
- vol->volume, 20.0*log(vol->volume)/M_LN10,
- precision_str[vol->precision]);
- }
+ vol->fdsp = avpriv_float_dsp_alloc(0);
+ if (!vol->fdsp)
+ return AVERROR(ENOMEM);
- return 0;
+ return set_expr(&vol->volume_pexpr, vol->volume_expr, ctx);
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+ VolumeContext *vol = ctx->priv;
+ av_expr_free(vol->volume_pexpr);
+ av_opt_free(vol);
+ av_freep(&vol->fdsp);
}
static int query_formats(AVFilterContext *ctx)
@@ -97,8 +133,7 @@ static int query_formats(AVFilterContext *ctx)
AVFilterFormats *formats = NULL;
AVFilterChannelLayouts *layouts;
static const enum AVSampleFormat sample_fmts[][7] = {
- /* PRECISION_FIXED */
- {
+ [PRECISION_FIXED] = {
AV_SAMPLE_FMT_U8,
AV_SAMPLE_FMT_U8P,
AV_SAMPLE_FMT_S16,
@@ -107,21 +142,19 @@ static int query_formats(AVFilterContext *ctx)
AV_SAMPLE_FMT_S32P,
AV_SAMPLE_FMT_NONE
},
- /* PRECISION_FLOAT */
- {
+ [PRECISION_FLOAT] = {
AV_SAMPLE_FMT_FLT,
AV_SAMPLE_FMT_FLTP,
AV_SAMPLE_FMT_NONE
},
- /* PRECISION_DOUBLE */
- {
+ [PRECISION_DOUBLE] = {
AV_SAMPLE_FMT_DBL,
AV_SAMPLE_FMT_DBLP,
AV_SAMPLE_FMT_NONE
}
};
- layouts = ff_all_channel_layouts();
+ layouts = ff_all_channel_counts();
if (!layouts)
return AVERROR(ENOMEM);
ff_set_common_channel_layouts(ctx, layouts);
@@ -185,8 +218,6 @@ static inline void scale_samples_s32(uint8_t *dst, const uint8_t *src,
smp_dst[i] = av_clipl_int32((((int64_t)smp_src[i] * volume + 128) >> 8));
}
-
-
static av_cold void volume_init(VolumeContext *vol)
{
vol->samples_align = 1;
@@ -208,11 +239,9 @@ static av_cold void volume_init(VolumeContext *vol)
vol->scale_samples = scale_samples_s32;
break;
case AV_SAMPLE_FMT_FLT:
- avpriv_float_dsp_init(&vol->fdsp, 0);
vol->samples_align = 4;
break;
case AV_SAMPLE_FMT_DBL:
- avpriv_float_dsp_init(&vol->fdsp, 0);
vol->samples_align = 8;
break;
}
@@ -221,6 +250,38 @@ static av_cold void volume_init(VolumeContext *vol)
ff_volume_init_x86(vol);
}
+static int set_volume(AVFilterContext *ctx)
+{
+ VolumeContext *vol = ctx->priv;
+
+ vol->volume = av_expr_eval(vol->volume_pexpr, vol->var_values, NULL);
+ if (isnan(vol->volume)) {
+ if (vol->eval_mode == EVAL_MODE_ONCE) {
+ av_log(ctx, AV_LOG_ERROR, "Invalid value NaN for volume\n");
+ return AVERROR(EINVAL);
+ } else {
+ av_log(ctx, AV_LOG_WARNING, "Invalid value NaN for volume, setting to 0\n");
+ vol->volume = 0;
+ }
+ }
+ vol->var_values[VAR_VOLUME] = vol->volume;
+
+ av_log(ctx, AV_LOG_VERBOSE, "n:%f t:%f pts:%f precision:%s ",
+ vol->var_values[VAR_N], vol->var_values[VAR_T], vol->var_values[VAR_PTS],
+ precision_str[vol->precision]);
+
+ if (vol->precision == PRECISION_FIXED) {
+ vol->volume_i = (int)(vol->volume * 256 + 0.5);
+ vol->volume = vol->volume_i / 256.0;
+ av_log(ctx, AV_LOG_VERBOSE, "volume_i:%d/255 ", vol->volume_i);
+ }
+ av_log(ctx, AV_LOG_VERBOSE, "volume:%f volume_dB:%f\n",
+ vol->volume, 20.0*log(vol->volume)/M_LN10);
+
+ volume_init(vol);
+ return 0;
+}
+
static int config_output(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
@@ -228,20 +289,59 @@ static int config_output(AVFilterLink *outlink)
AVFilterLink *inlink = ctx->inputs[0];
vol->sample_fmt = inlink->format;
- vol->channels = av_get_channel_layout_nb_channels(inlink->channel_layout);
+ vol->channels = inlink->channels;
vol->planes = av_sample_fmt_is_planar(inlink->format) ? vol->channels : 1;
- volume_init(vol);
+ vol->var_values[VAR_N] =
+ vol->var_values[VAR_NB_CONSUMED_SAMPLES] =
+ vol->var_values[VAR_NB_SAMPLES] =
+ vol->var_values[VAR_POS] =
+ vol->var_values[VAR_PTS] =
+ vol->var_values[VAR_STARTPTS] =
+ vol->var_values[VAR_STARTT] =
+ vol->var_values[VAR_T] =
+ vol->var_values[VAR_VOLUME] = NAN;
+
+ vol->var_values[VAR_NB_CHANNELS] = inlink->channels;
+ vol->var_values[VAR_TB] = av_q2d(inlink->time_base);
+ vol->var_values[VAR_SAMPLE_RATE] = inlink->sample_rate;
+
+ av_log(inlink->src, AV_LOG_VERBOSE, "tb:%f sample_rate:%f nb_channels:%f\n",
+ vol->var_values[VAR_TB],
+ vol->var_values[VAR_SAMPLE_RATE],
+ vol->var_values[VAR_NB_CHANNELS]);
+
+ return set_volume(ctx);
+}
- return 0;
+static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
+ char *res, int res_len, int flags)
+{
+ VolumeContext *vol = ctx->priv;
+ int ret = AVERROR(ENOSYS);
+
+ if (!strcmp(cmd, "volume")) {
+ if ((ret = set_expr(&vol->volume_pexpr, args, ctx)) < 0)
+ return ret;
+ if (vol->eval_mode == EVAL_MODE_ONCE)
+ set_volume(ctx);
+ }
+
+ return ret;
}
+#define D2TS(d) (isnan(d) ? AV_NOPTS_VALUE : (int64_t)(d))
+#define TS2D(ts) ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts))
+#define TS2T(ts, tb) ((ts) == AV_NOPTS_VALUE ? NAN : (double)(ts)*av_q2d(tb))
+
static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
{
+ AVFilterContext *ctx = inlink->dst;
VolumeContext *vol = inlink->dst->priv;
AVFilterLink *outlink = inlink->dst->outputs[0];
int nb_samples = buf->nb_samples;
AVFrame *out_buf;
+ int64_t pos;
AVFrameSideData *sd = av_frame_get_side_data(buf, AV_FRAME_DATA_REPLAYGAIN);
int ret;
@@ -283,8 +383,23 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
av_frame_remove_side_data(buf, AV_FRAME_DATA_REPLAYGAIN);
}
- if (vol->volume == 1.0 || vol->volume_i == 256)
- return ff_filter_frame(outlink, buf);
+ if (isnan(vol->var_values[VAR_STARTPTS])) {
+ vol->var_values[VAR_STARTPTS] = TS2D(buf->pts);
+ vol->var_values[VAR_STARTT ] = TS2T(buf->pts, inlink->time_base);
+ }
+ vol->var_values[VAR_PTS] = TS2D(buf->pts);
+ vol->var_values[VAR_T ] = TS2T(buf->pts, inlink->time_base);
+ vol->var_values[VAR_N ] = inlink->frame_count;
+
+ pos = av_frame_get_pkt_pos(buf);
+ vol->var_values[VAR_POS] = pos == -1 ? NAN : pos;
+ if (vol->eval_mode == EVAL_MODE_FRAME)
+ set_volume(ctx);
+
+ if (vol->volume == 1.0 || vol->volume_i == 256) {
+ out_buf = buf;
+ goto end;
+ }
/* do volume scaling in-place if input buffer is writable */
if (av_frame_is_writable(buf)) {
@@ -317,13 +432,13 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
}
} else if (av_get_packed_sample_fmt(vol->sample_fmt) == AV_SAMPLE_FMT_FLT) {
for (p = 0; p < vol->planes; p++) {
- vol->fdsp.vector_fmul_scalar((float *)out_buf->extended_data[p],
+ vol->fdsp->vector_fmul_scalar((float *)out_buf->extended_data[p],
(const float *)buf->extended_data[p],
vol->volume, plane_samples);
}
} else {
for (p = 0; p < vol->planes; p++) {
- vol->fdsp.vector_dmul_scalar((double *)out_buf->extended_data[p],
+ vol->fdsp->vector_dmul_scalar((double *)out_buf->extended_data[p],
(const double *)buf->extended_data[p],
vol->volume, plane_samples);
}
@@ -335,6 +450,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
if (buf != out_buf)
av_frame_free(&buf);
+end:
+ vol->var_values[VAR_NB_CONSUMED_SAMPLES] += out_buf->nb_samples;
return ff_filter_frame(outlink, out_buf);
}
@@ -363,6 +480,9 @@ AVFilter ff_af_volume = {
.priv_size = sizeof(VolumeContext),
.priv_class = &volume_class,
.init = init,
+ .uninit = uninit,
.inputs = avfilter_af_volume_inputs,
.outputs = avfilter_af_volume_outputs,
+ .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_GENERIC,
+ .process_command = process_command,
};
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-09 21:58:33 +0000