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ffmpeg/libavcodec/options.c

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/*
* Copyright (c) 2001 Fabrice Bellard
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
* 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
* Options definition for AVCodecContext.
*/
#include "avcodec.h"
#include "internal.h"
#include "libavutil/avassert.h"
#include "libavutil/internal.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include <float.h> /* FLT_MIN, FLT_MAX */
#include <string.h>
#include "options_table.h"
static const char* context_to_name(void* ptr) {
AVCodecContext *avc= ptr;
if(avc && avc->codec && avc->codec->name)
return avc->codec->name;
else
return "NULL";
}
static void *codec_child_next(void *obj, void *prev)
{
AVCodecContext *s = obj;
if (!prev && s->codec && s->codec->priv_class && s->priv_data)
return s->priv_data;
return NULL;
}
static const AVClass *codec_child_class_next(const AVClass *prev)
{
AVCodec *c = NULL;
/* find the codec that corresponds to prev */
while (prev && (c = av_codec_next(c)))
if (c->priv_class == prev)
break;
/* find next codec with priv options */
while (c = av_codec_next(c))
if (c->priv_class)
return c->priv_class;
return NULL;
}
static AVClassCategory get_category(void *ptr)
{
AVCodecContext* avctx = ptr;
if(avctx->codec && avctx->codec->decode) return AV_CLASS_CATEGORY_DECODER;
else return AV_CLASS_CATEGORY_ENCODER;
}
static const AVClass av_codec_context_class = {
.class_name = "AVCodecContext",
.item_name = context_to_name,
.option = avcodec_options,
.version = LIBAVUTIL_VERSION_INT,
.log_level_offset_offset = offsetof(AVCodecContext, log_level_offset),
.child_next = codec_child_next,
.child_class_next = codec_child_class_next,
.category = AV_CLASS_CATEGORY_ENCODER,
.get_category = get_category,
};
int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec)
{
int flags=0;
memset(s, 0, sizeof(AVCodecContext));
s->av_class = &av_codec_context_class;
s->codec_type = codec ? codec->type : AVMEDIA_TYPE_UNKNOWN;
if (codec) {
s->codec = codec;
s->codec_id = codec->id;
}
if(s->codec_type == AVMEDIA_TYPE_AUDIO)
flags= AV_OPT_FLAG_AUDIO_PARAM;
else if(s->codec_type == AVMEDIA_TYPE_VIDEO)
flags= AV_OPT_FLAG_VIDEO_PARAM;
else if(s->codec_type == AVMEDIA_TYPE_SUBTITLE)
flags= AV_OPT_FLAG_SUBTITLE_PARAM;
av_opt_set_defaults2(s, flags, flags);
s->time_base = (AVRational){0,1};
s->framerate = (AVRational){ 0, 1 };
s->pkt_timebase = (AVRational){ 0, 1 };
s->get_buffer2 = avcodec_default_get_buffer2;
s->get_format = avcodec_default_get_format;
s->execute = avcodec_default_execute;
s->execute2 = avcodec_default_execute2;
s->sample_aspect_ratio = (AVRational){0,1};
s->pix_fmt = AV_PIX_FMT_NONE;
s->sample_fmt = AV_SAMPLE_FMT_NONE;
s->reordered_opaque = AV_NOPTS_VALUE;
if(codec && codec->priv_data_size){
if(!s->priv_data){
s->priv_data= av_mallocz(codec->priv_data_size);
if (!s->priv_data) {
return AVERROR(ENOMEM);
}
}
if(codec->priv_class){
*(const AVClass**)s->priv_data = codec->priv_class;
av_opt_set_defaults(s->priv_data);
}
}
if (codec && codec->defaults) {
int ret;
const AVCodecDefault *d = codec->defaults;
while (d->key) {
ret = av_opt_set(s, d->key, d->value, 0);
av_assert0(ret >= 0);
d++;
}
}
return 0;
}
AVCodecContext *avcodec_alloc_context3(const AVCodec *codec)
{
AVCodecContext *avctx= av_malloc(sizeof(AVCodecContext));
if (!avctx)
return NULL;
if(avcodec_get_context_defaults3(avctx, codec) < 0){
av_free(avctx);
return NULL;
}
return avctx;
}
void avcodec_free_context(AVCodecContext **pavctx)
{
AVCodecContext *avctx = *pavctx;
if (!avctx)
return;
avcodec_close(avctx);
av_freep(&avctx->extradata);
av_freep(&avctx->subtitle_header);
av_freep(&avctx->intra_matrix);
av_freep(&avctx->inter_matrix);
av_freep(&avctx->rc_override);
av_freep(pavctx);
}
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
{
const AVCodec *orig_codec = dest->codec;
uint8_t *orig_priv_data = dest->priv_data;
if (avcodec_is_open(dest)) { // check that the dest context is uninitialized
av_log(dest, AV_LOG_ERROR,
"Tried to copy AVCodecContext %p into already-initialized %p\n",
src, dest);
return AVERROR(EINVAL);
}
av_opt_free(dest);
av_freep(&dest->rc_override);
av_freep(&dest->intra_matrix);
av_freep(&dest->inter_matrix);
av_freep(&dest->extradata);
av_freep(&dest->subtitle_header);
memcpy(dest, src, sizeof(*dest));
av_opt_copy(dest, src);
dest->priv_data = orig_priv_data;
dest->codec = orig_codec;
if (orig_priv_data && src->codec && src->codec->priv_class &&
dest->codec && dest->codec->priv_class)
av_opt_copy(orig_priv_data, src->priv_data);
/* set values specific to opened codecs back to their default state */
dest->slice_offset = NULL;
dest->hwaccel = NULL;
dest->internal = NULL;
dest->coded_frame = NULL;
/* reallocate values that should be allocated separately */
dest->extradata = NULL;
dest->intra_matrix = NULL;
dest->inter_matrix = NULL;
dest->rc_override = NULL;
dest->subtitle_header = NULL;
#define alloc_and_copy_or_fail(obj, size, pad) \
if (src->obj && size > 0) { \
dest->obj = av_malloc(size + pad); \
if (!dest->obj) \
goto fail; \
memcpy(dest->obj, src->obj, size); \
if (pad) \
memset(((uint8_t *) dest->obj) + size, 0, pad); \
}
alloc_and_copy_or_fail(extradata, src->extradata_size,
FF_INPUT_BUFFER_PADDING_SIZE);
dest->extradata_size = src->extradata_size;
alloc_and_copy_or_fail(intra_matrix, 64 * sizeof(int16_t), 0);
alloc_and_copy_or_fail(inter_matrix, 64 * sizeof(int16_t), 0);
alloc_and_copy_or_fail(rc_override, src->rc_override_count * sizeof(*src->rc_override), 0);
alloc_and_copy_or_fail(subtitle_header, src->subtitle_header_size, 1);
av_assert0(dest->subtitle_header_size == src->subtitle_header_size);
#undef alloc_and_copy_or_fail
return 0;
fail:
av_freep(&dest->rc_override);
av_freep(&dest->intra_matrix);
av_freep(&dest->inter_matrix);
av_freep(&dest->extradata);
av_freep(&dest->subtitle_header);
dest->subtitle_header_size = 0;
dest->extradata_size = 0;
av_opt_free(dest);
return AVERROR(ENOMEM);
}
const AVClass *avcodec_get_class(void)
{
return &av_codec_context_class;
}
#define FOFFSET(x) offsetof(AVFrame,x)
static const AVOption frame_options[]={
{"best_effort_timestamp", "", FOFFSET(best_effort_timestamp), AV_OPT_TYPE_INT64, {.i64 = AV_NOPTS_VALUE }, INT64_MIN, INT64_MAX, 0},
{"pkt_pos", "", FOFFSET(pkt_pos), AV_OPT_TYPE_INT64, {.i64 = -1 }, INT64_MIN, INT64_MAX, 0},
{"pkt_size", "", FOFFSET(pkt_size), AV_OPT_TYPE_INT64, {.i64 = -1 }, INT64_MIN, INT64_MAX, 0},
{"sample_aspect_ratio", "", FOFFSET(sample_aspect_ratio), AV_OPT_TYPE_RATIONAL, {.dbl = 0 }, 0, INT_MAX, 0},
{"width", "", FOFFSET(width), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
{"height", "", FOFFSET(height), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
{"format", "", FOFFSET(format), AV_OPT_TYPE_INT, {.i64 = -1 }, 0, INT_MAX, 0},
{"channel_layout", "", FOFFSET(channel_layout), AV_OPT_TYPE_INT64, {.i64 = 0 }, 0, INT64_MAX, 0},
{"sample_rate", "", FOFFSET(sample_rate), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
{NULL},
};
static const AVClass av_frame_class = {
.class_name = "AVFrame",
.item_name = NULL,
.option = frame_options,
.version = LIBAVUTIL_VERSION_INT,
};
const AVClass *avcodec_get_frame_class(void)
{
return &av_frame_class;
}
#define SROFFSET(x) offsetof(AVSubtitleRect,x)
static const AVOption subtitle_rect_options[]={
{"x", "", SROFFSET(x), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
{"y", "", SROFFSET(y), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
{"w", "", SROFFSET(w), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
{"h", "", SROFFSET(h), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
{"type", "", SROFFSET(type), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, INT_MAX, 0},
{"flags", "", SROFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, 1, 0, "flags"},
{"forced", "", SROFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, 1, 0},
{NULL},
};
static const AVClass av_subtitle_rect_class = {
.class_name = "AVSubtitleRect",
.item_name = NULL,
.option = subtitle_rect_options,
.version = LIBAVUTIL_VERSION_INT,
};
const AVClass *avcodec_get_subtitle_rect_class(void)
{
return &av_subtitle_rect_class;
}
#ifdef TEST
static int dummy_init(AVCodecContext *ctx)
{
//TODO: this code should set every possible pointer that could be set by codec and is not an option;
ctx->extradata_size = 8;
ctx->extradata = av_malloc(ctx->extradata_size);
ctx->coded_frame = av_frame_alloc();
return 0;
}
static int dummy_close(AVCodecContext *ctx)
{
av_freep(&ctx->extradata);
ctx->extradata_size = 0;
av_frame_free(&ctx->coded_frame);
return 0;
}
static int dummy_encode(AVCodecContext *ctx, AVPacket *pkt, const AVFrame *frame, int *got_packet)
{
return AVERROR(ENOSYS);
}
typedef struct Dummy12Context {
AVClass *av_class;
int num;
char* str;
} Dummy12Context;
typedef struct Dummy3Context {
void *fake_av_class;
int num;
char* str;
} Dummy3Context;
#define OFFSET(x) offsetof(Dummy12Context, x)
#define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM
static const AVOption dummy_options[] = {
{ "str", "set str", OFFSET(str), AV_OPT_TYPE_STRING, { .str = "i'm src default value" }, 0, 0, VE},
{ "num", "set num", OFFSET(num), AV_OPT_TYPE_INT, { .i64 = 1500100900 }, 0, INT_MAX, VE},
{ NULL },
};
static const AVClass dummy_v1_class = {
.class_name = "dummy_v1_class",
.item_name = av_default_item_name,
.option = dummy_options,
.version = LIBAVUTIL_VERSION_INT,
};
static const AVClass dummy_v2_class = {
.class_name = "dummy_v2_class",
.item_name = av_default_item_name,
.option = dummy_options,
.version = LIBAVUTIL_VERSION_INT,
};
/* codec with options */
AVCodec dummy_v1_encoder = {
.name = "dummy_v1_codec",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_NONE - 1,
.encode2 = dummy_encode,
.init = dummy_init,
.close = dummy_close,
.priv_class = &dummy_v1_class,
.priv_data_size = sizeof(Dummy12Context),
};
/* codec with options, different class */
AVCodec dummy_v2_encoder = {
.name = "dummy_v2_codec",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_NONE - 2,
.encode2 = dummy_encode,
.init = dummy_init,
.close = dummy_close,
.priv_class = &dummy_v2_class,
.priv_data_size = sizeof(Dummy12Context),
};
/* codec with priv data, but no class */
AVCodec dummy_v3_encoder = {
.name = "dummy_v3_codec",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_NONE - 3,
.encode2 = dummy_encode,
.init = dummy_init,
.close = dummy_close,
.priv_data_size = sizeof(Dummy3Context),
};
/* codec without priv data */
AVCodec dummy_v4_encoder = {
.name = "dummy_v4_codec",
.type = AVMEDIA_TYPE_VIDEO,
.id = AV_CODEC_ID_NONE - 4,
.encode2 = dummy_encode,
.init = dummy_init,
.close = dummy_close,
};
static void test_copy_print_codec(const AVCodecContext *ctx)
{
printf("%-14s: %dx%d prv: %s",
ctx->codec ? ctx->codec->name : "NULL",
ctx->width, ctx->height,
ctx->priv_data ? "set" : "null");
if (ctx->codec && ctx->codec->priv_class && ctx->codec->priv_data_size) {
int64_t i64;
char *str = NULL;
av_opt_get_int(ctx->priv_data, "num", 0, &i64);
av_opt_get(ctx->priv_data, "str", 0, (uint8_t**)&str);
printf(" opts: %"PRId64" %s", i64, str);
av_free(str);
}
printf("\n");
}
static void test_copy(const AVCodec *c1, const AVCodec *c2)
{
AVCodecContext *ctx1, *ctx2;
printf("%s -> %s\nclosed:\n", c1 ? c1->name : "NULL", c2 ? c2->name : "NULL");
ctx1 = avcodec_alloc_context3(c1);
ctx2 = avcodec_alloc_context3(c2);
ctx1->width = ctx1->height = 128;
if (ctx2->codec && ctx2->codec->priv_class && ctx2->codec->priv_data_size) {
av_opt_set(ctx2->priv_data, "num", "667", 0);
av_opt_set(ctx2->priv_data, "str", "i'm dest value before copy", 0);
}
avcodec_copy_context(ctx2, ctx1);
test_copy_print_codec(ctx1);
test_copy_print_codec(ctx2);
if (ctx1->codec) {
printf("opened:\n");
avcodec_open2(ctx1, ctx1->codec, NULL);
if (ctx2->codec && ctx2->codec->priv_class && ctx2->codec->priv_data_size) {
av_opt_set(ctx2->priv_data, "num", "667", 0);
av_opt_set(ctx2->priv_data, "str", "i'm dest value before copy", 0);
}
avcodec_copy_context(ctx2, ctx1);
test_copy_print_codec(ctx1);
test_copy_print_codec(ctx2);
avcodec_close(ctx1);
}
avcodec_free_context(&ctx1);
avcodec_free_context(&ctx2);
}
int main(void)
{
AVCodec *dummy_codec[] = {
&dummy_v1_encoder,
&dummy_v2_encoder,
&dummy_v3_encoder,
&dummy_v4_encoder,
NULL,
};
int i, j;
for (i = 0; dummy_codec[i]; i++)
avcodec_register(dummy_codec[i]);
printf("testing avcodec_copy_context()\n");
for (i = 0; i < FF_ARRAY_ELEMS(dummy_codec); i++)
for (j = 0; j < FF_ARRAY_ELEMS(dummy_codec); j++)
test_copy(dummy_codec[i], dummy_codec[j]);
return 0;
}
#endif
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