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avpacket: use AVBuffer to allow refcounting the packets.

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This will allow us to avoid copying the packets in many cases.

This breaks ABI.
This commit is contained in:
Anton Khirnov 2012-10-31 08:53:18 +01:00
parent 1cec0624d0
commit 1afddbe59e
22 changed files with 325 additions and 137 deletions
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42
libavcodec/avcodec.h
View File

@ -29,6 +29,7 @@
#include <errno.h>
#include "libavutil/samplefmt.h"
#include "libavutil/avutil.h"
#include "libavutil/buffer.h"
#include "libavutil/cpu.h"
#include "libavutil/dict.h"
#include "libavutil/log.h"
@ -892,17 +893,23 @@ enum AVPacketSideDataType {
* ABI. Thus it may be allocated on stack and no new fields can be added to it
* without libavcodec and libavformat major bump.
*
* The semantics of data ownership depends on the destruct field.
* If it is set, the packet data is dynamically allocated and is valid
* indefinitely until av_free_packet() is called (which in turn calls the
* destruct callback to free the data). If destruct is not set, the packet data
* is typically backed by some static buffer somewhere and is only valid for a
* limited time (e.g. until the next read call when demuxing).
* The semantics of data ownership depends on the buf or destruct (deprecated)
* fields. If either is set, the packet data is dynamically allocated and is
* valid indefinitely until av_free_packet() is called (which in turn calls
* av_buffer_unref()/the destruct callback to free the data). If neither is set,
* the packet data is typically backed by some static buffer somewhere and is
* only valid for a limited time (e.g. until the next read call when demuxing).
*
* The side data is always allocated with av_malloc() and is freed in
* av_free_packet().
*/
typedef struct AVPacket {
/**
* A reference to the reference-counted buffer where the packet data is
* stored.
* May be NULL, then the packet data is not reference-counted.
*/
AVBufferRef *buf;
/**
* Presentation timestamp in AVStream->time_base units; the time at which
* the decompressed packet will be presented to the user.
@ -942,8 +949,12 @@ typedef struct AVPacket {
* Equals next_pts - this_pts in presentation order.
*/
int duration;
#if FF_API_DESTRUCT_PACKET
attribute_deprecated
void (*destruct)(struct AVPacket *);
attribute_deprecated
void *priv;
#endif
int64_t pos; ///< byte position in stream, -1 if unknown
/**
@ -3413,10 +3424,14 @@ void avsubtitle_free(AVSubtitle *sub);
* @{
*/
#if FF_API_DESTRUCT_PACKET
/**
* Default packet destructor.
* @deprecated use the AVBuffer API instead
*/
attribute_deprecated
void av_destruct_packet(AVPacket *pkt);
#endif
/**
* Initialize optional fields of a packet with default values.
@ -3454,6 +3469,21 @@ void av_shrink_packet(AVPacket *pkt, int size);
*/
int av_grow_packet(AVPacket *pkt, int grow_by);
/**
* Initialize a reference-counted packet from av_malloc()ed data.
*
* @param pkt packet to be initialized. This function will set the data, size,
* buf and destruct fields, all others are left untouched.
* @param data Data allocated by av_malloc() to be used as packet data. If this
* function returns successfully, the data is owned by the underlying AVBuffer.
* The caller may not access the data through other means.
* @param size size of data in bytes, without the padding. I.e. the full buffer
* size is assumed to be size + FF_INPUT_BUFFER_PADDING_SIZE.
*
* @return 0 on success, a negative AVERROR on error
*/
int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size);
/**
* @warning This is a hack - the packet memory allocation stuff is broken. The
* packet is allocated if it was not really allocated.

121
libavcodec/avpacket.c
View File

@ -22,9 +22,11 @@
#include <string.h>
#include "libavutil/avassert.h"
#include "libavutil/common.h"
#include "libavutil/mem.h"
#include "avcodec.h"
#if FF_API_DESTRUCT_PACKET
void av_destruct_packet(AVPacket *pkt)
{
av_free(pkt->data);
@ -32,6 +34,14 @@ void av_destruct_packet(AVPacket *pkt)
pkt->size = 0;
}
/* a dummy destruct callback for the callers that assume AVPacket.destruct ==
* NULL => static data */
static void dummy_destruct_packet(AVPacket *pkt)
{
av_assert0(0);
}
#endif
void av_init_packet(AVPacket *pkt)
{
pkt->pts = AV_NOPTS_VALUE;
@ -41,27 +51,35 @@ void av_init_packet(AVPacket *pkt)
pkt->convergence_duration = 0;
pkt->flags = 0;
pkt->stream_index = 0;
#if FF_API_DESTRUCT_PACKET
pkt->destruct = NULL;
#endif
pkt->buf = NULL;
pkt->side_data = NULL;
pkt->side_data_elems = 0;
}
int av_new_packet(AVPacket *pkt, int size)
{
uint8_t *data = NULL;
if ((unsigned)size < (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE);
if (data) {
memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
} else
size = 0;
AVBufferRef *buf = NULL;
if ((unsigned)size >= (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE)
return AVERROR(EINVAL);
av_buffer_realloc(&buf, size + FF_INPUT_BUFFER_PADDING_SIZE);
if (!buf)
return AVERROR(ENOMEM);
memset(buf->data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
av_init_packet(pkt);
pkt->data = data;
pkt->buf = buf;
pkt->data = buf->data;
pkt->size = size;
pkt->destruct = av_destruct_packet;
if (!data)
return AVERROR(ENOMEM);
#if FF_API_DESTRUCT_PACKET
pkt->destruct = dummy_destruct_packet;
#endif
return 0;
}
@ -75,33 +93,71 @@ void av_shrink_packet(AVPacket *pkt, int size)
int av_grow_packet(AVPacket *pkt, int grow_by)
{
void *new_ptr;
int new_size;
av_assert0((unsigned)pkt->size <= INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE);
if (!pkt->size)
return av_new_packet(pkt, grow_by);
if ((unsigned)grow_by >
INT_MAX - (pkt->size + FF_INPUT_BUFFER_PADDING_SIZE))
return -1;
new_ptr = av_realloc(pkt->data,
pkt->size + grow_by + FF_INPUT_BUFFER_PADDING_SIZE);
if (!new_ptr)
return AVERROR(ENOMEM);
pkt->data = new_ptr;
new_size = pkt->size + grow_by + FF_INPUT_BUFFER_PADDING_SIZE;
if (pkt->buf) {
int ret = av_buffer_realloc(&pkt->buf, new_size);
if (ret < 0)
return ret;
} else {
pkt->buf = av_buffer_alloc(new_size);
if (!pkt->buf)
return AVERROR(ENOMEM);
memcpy(pkt->buf->data, pkt->data, FFMIN(pkt->size, pkt->size + grow_by));
#if FF_API_DESTRUCT_PACKET
pkt->destruct = dummy_destruct_packet;
#endif
}
pkt->data = pkt->buf->data;
pkt->size += grow_by;
memset(pkt->data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
return 0;
}
#define DUP_DATA(dst, src, size, padding) \
int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size)
{
if (size >= INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE)
return AVERROR(EINVAL);
pkt->buf = av_buffer_create(data, size + FF_INPUT_BUFFER_PADDING_SIZE,
av_buffer_default_free, NULL, 0);
if (!pkt->buf)
return AVERROR(ENOMEM);
pkt->data = data;
pkt->size = size;
#if FF_API_DESTRUCT_PACKET
pkt->destruct = dummy_destruct_packet;
#endif
return 0;
}
#define ALLOC_MALLOC(data, size) data = av_malloc(size)
#define ALLOC_BUF(data, size) \
do { \
av_buffer_realloc(&pkt->buf, size); \
data = pkt->buf ? pkt->buf->data : NULL; \
} while (0)
#define DUP_DATA(dst, src, size, padding, ALLOC) \
do { \
void *data; \
if (padding) { \
if ((unsigned)(size) > \
(unsigned)(size) + FF_INPUT_BUFFER_PADDING_SIZE) \
goto failed_alloc; \
data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE); \
ALLOC(data, size + FF_INPUT_BUFFER_PADDING_SIZE); \
} else { \
data = av_malloc(size); \
ALLOC(data, size); \
} \
if (!data) \
goto failed_alloc; \
@ -116,30 +172,36 @@ int av_dup_packet(AVPacket *pkt)
{
AVPacket tmp_pkt;
if (pkt->destruct == NULL && pkt->data) {
if (!pkt->buf && pkt->data
#if FF_API_DESTRUCT_PACKET
&& !pkt->destruct
#endif
) {
tmp_pkt = *pkt;
pkt->data = NULL;
pkt->side_data = NULL;
DUP_DATA(pkt->data, tmp_pkt.data, pkt->size, 1);
pkt->destruct = av_destruct_packet;
DUP_DATA(pkt->data, tmp_pkt.data, pkt->size, 1, ALLOC_BUF);
#if FF_API_DESTRUCT_PACKET
pkt->destruct = dummy_destruct_packet;
#endif
if (pkt->side_data_elems) {
int i;
DUP_DATA(pkt->side_data, tmp_pkt.side_data,
pkt->side_data_elems * sizeof(*pkt->side_data), 0);
pkt->side_data_elems * sizeof(*pkt->side_data), 0, ALLOC_MALLOC);
memset(pkt->side_data, 0,
pkt->side_data_elems * sizeof(*pkt->side_data));
for (i = 0; i < pkt->side_data_elems; i++)
DUP_DATA(pkt->side_data[i].data, tmp_pkt.side_data[i].data,
tmp_pkt.side_data[i].size, 1);
tmp_pkt.side_data[i].size, 1, ALLOC_MALLOC);
}
}
return 0;
failed_alloc:
av_destruct_packet(pkt);
av_free_packet(pkt);
return AVERROR(ENOMEM);
}
@ -148,8 +210,13 @@ void av_free_packet(AVPacket *pkt)
if (pkt) {
int i;
if (pkt->destruct)
if (pkt->buf)
av_buffer_unref(&pkt->buf);
#if FF_API_DESTRUCT_PACKET
else if (pkt->destruct)
pkt->destruct(pkt);
pkt->destruct = NULL;
#endif
pkt->data = NULL;
pkt->size = 0;

18
libavcodec/utils.c
View File

@ -887,13 +887,19 @@ int ff_alloc_packet(AVPacket *avpkt, int size)
return AVERROR(EINVAL);
if (avpkt->data) {
AVBufferRef *buf = avpkt->buf;
#if FF_API_DESTRUCT_PACKET
void *destruct = avpkt->destruct;
#endif
if (avpkt->size < size)
return AVERROR(EINVAL);
av_init_packet(avpkt);
#if FF_API_DESTRUCT_PACKET
avpkt->destruct = destruct;
#endif
avpkt->buf = buf;
avpkt->size = size;
return 0;
} else {
@ -1020,9 +1026,9 @@ int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx,
}
if (!user_packet && avpkt->size) {
uint8_t *new_data = av_realloc(avpkt->data, avpkt->size);
if (new_data)
avpkt->data = new_data;
ret = av_buffer_realloc(&avpkt->buf, avpkt->size);
if (ret >= 0)
avpkt->data = avpkt->buf->data;
}
avctx->frame_number++;
@ -1197,9 +1203,9 @@ int attribute_align_arg avcodec_encode_video2(AVCodecContext *avctx,
avpkt->pts = avpkt->dts = frame->pts;
if (!user_packet && avpkt->size) {
uint8_t *new_data = av_realloc(avpkt->data, avpkt->size);
if (new_data)
avpkt->data = new_data;
ret = av_buffer_realloc(&avpkt->buf, avpkt->size);
if (ret >= 0)
avpkt->data = avpkt->buf->data;
}
avctx->frame_number++;

3
libavcodec/version.h
View File

@ -100,5 +100,8 @@
#ifndef FF_API_DEINTERLACE
#define FF_API_DEINTERLACE (LIBAVCODEC_VERSION_MAJOR < 56)
#endif
#ifndef FF_API_DESTRUCT_PACKET
#define FF_API_DESTRUCT_PACKET (LIBAVCODEC_VERSION_MAJOR < 56)
#endif
#endif /* AVCODEC_VERSION_H */

92
libavdevice/v4l2.c
View File

@ -42,6 +42,8 @@
#else
#include <linux/videodev2.h>
#endif
#include "libavutil/atomic.h"
#include "libavutil/avassert.h"
#include "libavutil/imgutils.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
@ -67,6 +69,7 @@ struct video_data {
int top_field_first;
int buffers;
volatile int buffers_queued;
void **buf_start;
unsigned int *buf_len;
char *standard;
@ -79,6 +82,7 @@ struct video_data {
};
struct buff_data {
struct video_data *s;
int index;
int fd;
};
@ -405,14 +409,19 @@ static int mmap_init(AVFormatContext *ctx)
return 0;
}
static void mmap_release_buffer(AVPacket *pkt)
#if FF_API_DESTRUCT_PACKET
static void dummy_release_buffer(AVPacket *pkt)
{
av_assert0(0);
}
#endif
static void mmap_release_buffer(void *opaque, uint8_t *data)
{
struct v4l2_buffer buf = { 0 };
int res, fd;
struct buff_data *buf_descriptor = pkt->priv;
if (pkt->data == NULL)
return;
struct buff_data *buf_descriptor = opaque;
struct video_data *s = buf_descriptor->s;
buf.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
buf.memory = V4L2_MEMORY_MMAP;
@ -424,9 +433,7 @@ static void mmap_release_buffer(AVPacket *pkt)
if (res < 0)
av_log(NULL, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF): %s\n",
strerror(errno));
pkt->data = NULL;
pkt->size = 0;
avpriv_atomic_int_add_and_fetch(&s->buffers_queued, 1);
}
static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt)
@ -436,7 +443,6 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt)
.type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
.memory = V4L2_MEMORY_MMAP
};
struct buff_data *buf_descriptor;
struct pollfd p = { .fd = s->fd, .events = POLLIN };
int res;
@ -465,6 +471,9 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt)
av_log(ctx, AV_LOG_ERROR, "Invalid buffer index received.\n");
return AVERROR(EINVAL);
}
avpriv_atomic_int_add_and_fetch(&s->buffers_queued, -1);
// always keep at least one buffer queued
av_assert0(avpriv_atomic_int_get(&s->buffers_queued) >= 1);
if (s->frame_size > 0 && buf.bytesused != s->frame_size) {
av_log(ctx, AV_LOG_ERROR,
@ -475,23 +484,53 @@ static int mmap_read_frame(AVFormatContext *ctx, AVPacket *pkt)
}
/* Image is at s->buff_start[buf.index] */
pkt->data= s->buf_start[buf.index];
pkt->size = buf.bytesused;
pkt->pts = buf.timestamp.tv_sec * INT64_C(1000000) + buf.timestamp.tv_usec;
pkt->destruct = mmap_release_buffer;
buf_descriptor = av_malloc(sizeof(struct buff_data));
if (buf_descriptor == NULL) {
/* Something went wrong... Since av_malloc() failed, we cannot even
* allocate a buffer for memcopying into it
*/
av_log(ctx, AV_LOG_ERROR, "Failed to allocate a buffer descriptor\n");
res = ioctl(s->fd, VIDIOC_QBUF, &buf);
if (avpriv_atomic_int_get(&s->buffers_queued) == FFMAX(s->buffers / 8, 1)) {
/* when we start getting low on queued buffers, fallback to copying data */
res = av_new_packet(pkt, buf.bytesused);
if (res < 0) {
av_log(ctx, AV_LOG_ERROR, "Error allocating a packet.\n");
return res;
}
memcpy(pkt->data, s->buf_start[buf.index], buf.bytesused);
return AVERROR(ENOMEM);
res = ioctl(s->fd, VIDIOC_QBUF, &buf);
if (res < 0) {
av_log(ctx, AV_LOG_ERROR, "ioctl(VIDIOC_QBUF)\n");
av_free_packet(pkt);
return AVERROR(errno);
}
avpriv_atomic_int_add_and_fetch(&s->buffers_queued, 1);
} else {
struct buff_data *buf_descriptor;
pkt->data = s->buf_start[buf.index];
pkt->size = buf.bytesused;
#if FF_API_DESTRUCT_PACKET
pkt->destruct = dummy_release_buffer;
#endif
buf_descriptor = av_malloc(sizeof(struct buff_data));
if (buf_descriptor == NULL) {
/* Something went wrong... Since av_malloc() failed, we cannot even
* allocate a buffer for memcpying into it
*/
av_log(ctx, AV_LOG_ERROR, "Failed to allocate a buffer descriptor\n");
res = ioctl(s->fd, VIDIOC_QBUF, &buf);
return AVERROR(ENOMEM);
}
buf_descriptor->fd = s->fd;
buf_descriptor->index = buf.index;
buf_descriptor->s = s;
pkt->buf = av_buffer_create(pkt->data, pkt->size, mmap_release_buffer,
buf_descriptor, 0);
if (!pkt->buf) {
av_freep(&buf_descriptor);
return AVERROR(ENOMEM);
}
}
buf_descriptor->fd = s->fd;
buf_descriptor->index = buf.index;
pkt->priv = buf_descriptor;
pkt->pts = buf.timestamp.tv_sec * INT64_C(1000000) + buf.timestamp.tv_usec;
return s->buf_len[buf.index];
}
@ -517,6 +556,7 @@ static int mmap_start(AVFormatContext *ctx)
return AVERROR(errno);
}
}
s->buffers_queued = s->buffers;
type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
res = ioctl(s->fd, VIDIOC_STREAMON, &type);
@ -812,6 +852,10 @@ static int v4l2_read_close(AVFormatContext *s1)
{
struct video_data *s = s1->priv_data;
if (avpriv_atomic_int_get(&s->buffers_queued) != s->buffers)
av_log(s1, AV_LOG_WARNING, "Some buffers are still owned by the caller on "
"close.\n");
mmap_close(s);
close(s->fd);

16
libavformat/asfdec.c
View File

@ -1232,9 +1232,10 @@ static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pk
asf_st->ds_span);
} else {
/* packet descrambling */
uint8_t *newdata = av_malloc(asf_st->pkt.size +
FF_INPUT_BUFFER_PADDING_SIZE);
if (newdata) {
AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
FF_INPUT_BUFFER_PADDING_SIZE);
if (buf) {
uint8_t *newdata = buf->data;
int offset = 0;
memset(newdata + asf_st->pkt.size, 0,
FF_INPUT_BUFFER_PADDING_SIZE);
@ -1250,13 +1251,18 @@ static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pk
asf_st->ds_chunk_size);
offset += asf_st->ds_chunk_size;
}
av_free(asf_st->pkt.data);
asf_st->pkt.data = newdata;
av_buffer_unref(&asf_st->pkt.buf);
asf_st->pkt.buf = buf;
asf_st->pkt.data = buf->data;
}
}
}
asf_st->frag_offset = 0;
*pkt = asf_st->pkt;
#if FF_API_DESTRUCT_PACKET
asf_st->pkt.destruct = NULL;
#endif
asf_st->pkt.buf = 0;
asf_st->pkt.size = 0;
asf_st->pkt.data = 0;
asf_st->pkt.side_data_elems = 0;

14
libavformat/avformat.h
View File

@ -158,9 +158,9 @@
* information will be in AVStream.time_base units, i.e. it has to be
* multiplied by the timebase to convert them to seconds.
*
* If AVPacket.destruct is set on the returned packet, then the packet is
* If AVPacket.buf is set on the returned packet, then the packet is
* allocated dynamically and the user may keep it indefinitely.
* Otherwise, if AVPacket.destruct is NULL, the packet data is backed by a
* Otherwise, if AVPacket.buf is NULL, the packet data is backed by a
* static storage somewhere inside the demuxer and the packet is only valid
* until the next av_read_frame() call or closing the file. If the caller
* requires a longer lifetime, av_dup_packet() will make an av_malloc()ed copy
@ -1313,7 +1313,7 @@ int av_read_packet(AVFormatContext *s, AVPacket *pkt);
* omit invalid data between valid frames so as to give the decoder the maximum
* information possible for decoding.
*
* If pkt->destruct is NULL, then the packet is valid until the next
* If pkt->buf is NULL, then the packet is valid until the next
* av_read_frame() or until av_close_input_file(). Otherwise the packet is valid
* indefinitely. In both cases the packet must be freed with
* av_free_packet when it is no longer needed. For video, the packet contains
@ -1461,10 +1461,10 @@ int av_write_frame(AVFormatContext *s, AVPacket *pkt);
* demuxer level.
*
* @param s media file handle
* @param pkt The packet containing the data to be written. Libavformat takes
* ownership of the data and will free it when it sees fit using the packet's
* @ref AVPacket.destruct "destruct" field. The caller must not access the data
* after this function returns, as it may already be freed.
* @param pkt The packet containing the data to be written. pkt->buf must be set
* to a valid AVBufferRef describing the packet data. Libavformat takes
* ownership of this reference and will unref it when it sees fit. The caller
* must not access the data through this reference after this function returns.
* This can be NULL (at any time, not just at the end), to flush the
* interleaving queues.
* Packet's @ref AVPacket.stream_index "stream_index" field must be set to the

8
libavformat/avidec.c
View File

@ -980,7 +980,9 @@ static int avi_read_packet(AVFormatContext *s, AVPacket *pkt)
AVIContext *avi = s->priv_data;
AVIOContext *pb = s->pb;
int err;
#if FF_API_DESTRUCT_PACKET
void* dstr;
#endif
if (CONFIG_DV_DEMUXER && avi->dv_demux) {
int size = avpriv_dv_get_packet(avi->dv_demux, pkt);
@ -1081,10 +1083,16 @@ resync:
}
if (CONFIG_DV_DEMUXER && avi->dv_demux) {
AVBufferRef *avbuf = pkt->buf;
#if FF_API_DESTRUCT_PACKET
dstr = pkt->destruct;
#endif
size = avpriv_dv_produce_packet(avi->dv_demux, pkt,
pkt->data, pkt->size);
#if FF_API_DESTRUCT_PACKET
pkt->destruct = dstr;
#endif
pkt->buf = avbuf;
pkt->flags |= AV_PKT_FLAG_KEY;
if (size < 0)
av_free_packet(pkt);

13
libavformat/flacdec.c
View File

@ -32,7 +32,8 @@ static int parse_picture(AVFormatContext *s, uint8_t *buf, int buf_size)
{
const CodecMime *mime = ff_id3v2_mime_tags;
enum AVCodecID id = AV_CODEC_ID_NONE;
uint8_t mimetype[64], *desc = NULL, *data = NULL;
AVBufferRef *data = NULL;
uint8_t mimetype[64], *desc = NULL;
AVIOContext *pb = NULL;
AVStream *st;
int type, width, height;
@ -110,11 +111,11 @@ static int parse_picture(AVFormatContext *s, uint8_t *buf, int buf_size)
ret = AVERROR_INVALIDDATA;
goto fail;
}
if (!(data = av_malloc(len))) {
if (!(data = av_buffer_alloc(len))) {
ret = AVERROR(ENOMEM);
goto fail;
}
if (avio_read(pb, data, len) != len) {
if (avio_read(pb, data->data, len) != len) {
av_log(s, AV_LOG_ERROR, "Error reading attached picture data.\n");
if (s->error_recognition & AV_EF_EXPLODE)
ret = AVERROR(EIO);
@ -128,9 +129,9 @@ static int parse_picture(AVFormatContext *s, uint8_t *buf, int buf_size)
}
av_init_packet(&st->attached_pic);
st->attached_pic.data = data;
st->attached_pic.buf = data;
st->attached_pic.data = data->data;
st->attached_pic.size = len;
st->attached_pic.destruct = av_destruct_packet;
st->attached_pic.stream_index = st->index;
st->attached_pic.flags |= AV_PKT_FLAG_KEY;
@ -148,8 +149,8 @@ static int parse_picture(AVFormatContext *s, uint8_t *buf, int buf_size)
return 0;
fail:
av_buffer_unref(&data);
av_freep(&desc);
av_freep(&data);
av_freep(&pb);
return ret;

16
libavformat/id3v2.c
View File

@ -420,7 +420,7 @@ finish:
static void free_apic(void *obj)
{
ID3v2ExtraMetaAPIC *apic = obj;
av_freep(&apic->data);
av_buffer_unref(&apic->buf);
av_freep(&apic->description);
av_freep(&apic);
}
@ -476,9 +476,8 @@ static void read_apic(AVFormatContext *s, AVIOContext *pb, int taglen, char *tag
goto fail;
}
apic->len = taglen;
apic->data = av_malloc(taglen);
if (!apic->data || avio_read(pb, apic->data, taglen) != taglen)
apic->buf = av_buffer_alloc(taglen);
if (!apic->buf || avio_read(pb, apic->buf->data, taglen) != taglen)
goto fail;
new_extra->tag = "APIC";
@ -734,14 +733,13 @@ int ff_id3v2_parse_apic(AVFormatContext *s, ID3v2ExtraMeta **extra_meta)
av_dict_set(&st->metadata, "comment", apic->type, 0);
av_init_packet(&st->attached_pic);
st->attached_pic.data = apic->data;
st->attached_pic.size = apic->len;
st->attached_pic.destruct = av_destruct_packet;
st->attached_pic.buf = apic->buf;
st->attached_pic.data = apic->buf->data;
st->attached_pic.size = apic->buf->size;
st->attached_pic.stream_index = st->index;
st->attached_pic.flags |= AV_PKT_FLAG_KEY;
apic->data = NULL;
apic->len = 0;
apic->buf = NULL;
}
return 0;

3
libavformat/id3v2.h
View File

@ -67,8 +67,7 @@ typedef struct ID3v2ExtraMetaGEOB {
} ID3v2ExtraMetaGEOB;
typedef struct ID3v2ExtraMetaAPIC {
uint8_t *data;
int len;
AVBufferRef *buf;
const char *type;
uint8_t *description;
enum AVCodecID id;

14
libavformat/matroskadec.c
View File

@ -1107,7 +1107,8 @@ static int matroska_decode_buffer(uint8_t** buf, int* buf_size,
static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
AVPacket *pkt, uint64_t display_duration)
{
char *line, *layer, *ptr = pkt->data, *end = ptr+pkt->size;
AVBufferRef *line;
char *layer, *ptr = pkt->data, *end = ptr+pkt->size;
for (; *ptr!=',' && ptr<end-1; ptr++);
if (*ptr == ',')
layer = ++ptr;
@ -1125,13 +1126,14 @@ static void matroska_fix_ass_packet(MatroskaDemuxContext *matroska,
es = ec/ 100; ec -= 100*es;
*ptr++ = '\0';
len = 50 + end-ptr + FF_INPUT_BUFFER_PADDING_SIZE;
if (!(line = av_malloc(len)))
if (!(line = av_buffer_alloc(len)))
return;
snprintf(line,len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
snprintf(line->data, len,"Dialogue: %s,%d:%02d:%02d.%02d,%d:%02d:%02d.%02d,%s\r\n",
layer, sh, sm, ss, sc, eh, em, es, ec, ptr);
av_free(pkt->data);
pkt->data = line;
pkt->size = strlen(line);
av_buffer_unref(&pkt->buf);
pkt->buf = line;
pkt->data = line->data;
pkt->size = strlen(line->data);
}
}

28
libavformat/matroskaenc.c
View File

@ -90,7 +90,6 @@ typedef struct MatroskaMuxContext {
mkv_cues *cues;
mkv_track *tracks;
unsigned int audio_buffer_size;
AVPacket cur_audio_pkt;
int have_attachments;
@ -969,7 +968,6 @@ static int mkv_write_header(AVFormatContext *s)
av_init_packet(&mkv->cur_audio_pkt);
mkv->cur_audio_pkt.size = 0;
mkv->audio_buffer_size = 0;
avio_flush(pb);
return 0;
@ -1180,19 +1178,6 @@ static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
return 0;
}
static int mkv_copy_packet(MatroskaMuxContext *mkv, const AVPacket *pkt)
{
uint8_t *data = mkv->cur_audio_pkt.data;
mkv->cur_audio_pkt = *pkt;
mkv->cur_audio_pkt.data = av_fast_realloc(data, &mkv->audio_buffer_size, pkt->size);
if (!mkv->cur_audio_pkt.data)
return AVERROR(ENOMEM);
memcpy(mkv->cur_audio_pkt.data, pkt->data, pkt->size);
mkv->cur_audio_pkt.size = pkt->size;
return 0;
}
static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
{
MatroskaMuxContext *mkv = s->priv_data;
@ -1219,7 +1204,7 @@ static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
// check if we have an audio packet cached
if (mkv->cur_audio_pkt.size > 0) {
ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
mkv->cur_audio_pkt.size = 0;
av_free_packet(&mkv->cur_audio_pkt);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret);
return ret;
@ -1228,9 +1213,11 @@ static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
// buffer an audio packet to ensure the packet containing the video
// keyframe's timecode is contained in the same cluster for WebM
if (codec->codec_type == AVMEDIA_TYPE_AUDIO)
ret = mkv_copy_packet(mkv, pkt);
else
if (codec->codec_type == AVMEDIA_TYPE_AUDIO) {
mkv->cur_audio_pkt = *pkt;
mkv->cur_audio_pkt.buf = av_buffer_ref(pkt->buf);
ret = mkv->cur_audio_pkt.buf ? 0 : AVERROR(ENOMEM);
} else
ret = mkv_write_packet_internal(s, pkt);
return ret;
}
@ -1245,7 +1232,7 @@ static int mkv_write_trailer(AVFormatContext *s)
// check if we have an audio packet cached
if (mkv->cur_audio_pkt.size > 0) {
ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
mkv->cur_audio_pkt.size = 0;
av_free_packet(&mkv->cur_audio_pkt);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Could not write cached audio packet ret:%d\n", ret);
return ret;
@ -1282,7 +1269,6 @@ static int mkv_write_trailer(AVFormatContext *s)
av_free(mkv->tracks);
av_freep(&mkv->cues->entries);
av_freep(&mkv->cues);
av_destruct_packet(&mkv->cur_audio_pkt);
return 0;
}

6
libavformat/mp3enc.c
View File

@ -343,7 +343,11 @@ static int mp3_write_packet(AVFormatContext *s, AVPacket *pkt)
return AVERROR(ENOMEM);
pktl->pkt = *pkt;
pkt->destruct = NULL;
pktl->pkt.buf = av_buffer_ref(pkt->buf);
if (!pktl->pkt.buf) {
av_freep(&pktl);
return AVERROR(ENOMEM);
}
if (mp3->queue_end)
mp3->queue_end->next = pktl;

18
libavformat/mpegts.c
View File

@ -19,6 +19,7 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/buffer.h"
#include "libavutil/crc.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/log.h"
@ -173,7 +174,7 @@ typedef struct PESContext {
int64_t pts, dts;
int64_t ts_packet_pos; /**< position of first TS packet of this PES packet */
uint8_t header[MAX_PES_HEADER_SIZE];
uint8_t *buffer;
AVBufferRef *buffer;
SLConfigDescr sl;
} PESContext;
@ -364,7 +365,7 @@ static void mpegts_close_filter(MpegTSContext *ts, MpegTSFilter *filter)
av_freep(&filter->u.section_filter.section_buf);
else if (filter->type == MPEGTS_PES) {
PESContext *pes = filter->u.pes_filter.opaque;
av_freep(&pes->buffer);
av_buffer_unref(&pes->buffer);
/* referenced private data will be freed later in
* avformat_close_input */
if (!((PESContext *)filter->u.pes_filter.opaque)->st) {
@ -635,8 +636,8 @@ static void new_pes_packet(PESContext *pes, AVPacket *pkt)
{
av_init_packet(pkt);
pkt->destruct = av_destruct_packet;
pkt->data = pes->buffer;
pkt->buf = pes->buffer;
pkt->data = pes->buffer->data;
pkt->size = pes->data_index;
if(pes->total_size != MAX_PES_PAYLOAD &&
@ -793,7 +794,8 @@ static int mpegts_push_data(MpegTSFilter *filter,
pes->total_size = MAX_PES_PAYLOAD;
/* allocate pes buffer */
pes->buffer = av_malloc(pes->total_size+FF_INPUT_BUFFER_PADDING_SIZE);
pes->buffer = av_buffer_alloc(pes->total_size +
FF_INPUT_BUFFER_PADDING_SIZE);
if (!pes->buffer)
return AVERROR(ENOMEM);
@ -895,7 +897,7 @@ static int mpegts_push_data(MpegTSFilter *filter,
if (pes->data_index > 0 && pes->data_index+buf_size > pes->total_size) {
new_pes_packet(pes, ts->pkt);
pes->total_size = MAX_PES_PAYLOAD;
pes->buffer = av_malloc(pes->total_size+FF_INPUT_BUFFER_PADDING_SIZE);
pes->buffer = av_buffer_alloc(pes->total_size + FF_INPUT_BUFFER_PADDING_SIZE);
if (!pes->buffer)
return AVERROR(ENOMEM);
ts->stop_parse = 1;
@ -904,7 +906,7 @@ static int mpegts_push_data(MpegTSFilter *filter,
// not sure if this is legal in ts but see issue #2392
buf_size = pes->total_size;
}
memcpy(pes->buffer+pes->data_index, p, buf_size);
memcpy(pes->buffer->data + pes->data_index, p, buf_size);
pes->data_index += buf_size;
}
buf_size = 0;
@ -1781,7 +1783,7 @@ static int handle_packets(MpegTSContext *ts, int nb_packets)
if (ts->pids[i]) {
if (ts->pids[i]->type == MPEGTS_PES) {
PESContext *pes = ts->pids[i]->u.pes_filter.opaque;
av_freep(&pes->buffer);
av_buffer_unref(&pes->buffer);
pes->data_index = 0;
pes->state = MPEGTS_SKIP; /* skip until pes header */
}

3
libavformat/mux.c
View File

@ -420,7 +420,10 @@ void ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt,
this_pktl = av_mallocz(sizeof(AVPacketList));
this_pktl->pkt = *pkt;
#if FF_API_DESTRUCT_PACKET
pkt->destruct = NULL; // do not free original but only the copy
#endif
pkt->buf = NULL;
av_dup_packet(&this_pktl->pkt); // duplicate the packet if it uses non-alloced memory
if (s->streams[pkt->stream_index]->last_in_packet_buffer) {

6
libavformat/mxg.c
View File

@ -168,7 +168,10 @@ static int mxg_read_packet(AVFormatContext *s, AVPacket *pkt)
pkt->pts = pkt->dts = mxg->dts;
pkt->stream_index = 0;
#if FF_API_DESTRUCT_PACKET
pkt->destruct = NULL;
#endif
pkt->buf = NULL;
pkt->size = mxg->buffer_ptr - mxg->soi_ptr;
pkt->data = mxg->soi_ptr;
@ -206,7 +209,10 @@ static int mxg_read_packet(AVFormatContext *s, AVPacket *pkt)
/* time (GMT) of first sample in usec since 1970, little-endian */
pkt->pts = pkt->dts = AV_RL64(startmarker_ptr + 8);
pkt->stream_index = 1;
#if FF_API_DESTRUCT_PACKET
pkt->destruct = NULL;
#endif
pkt->buf = NULL;
pkt->size = size - 14;
pkt->data = startmarker_ptr + 16;

4
libavformat/psxstr.c
View File

@ -201,6 +201,10 @@ static int str_read_packet(AVFormatContext *s,
*ret_pkt = *pkt;
pkt->data= NULL;
pkt->size= -1;
pkt->buf = NULL;
#if FF_API_DESTRUCT_PACKET
pkt->destruct = NULL;
#endif
return 0;
}

4
libavformat/rmdec.c
View File

@ -678,6 +678,10 @@ static int rm_assemble_video_frame(AVFormatContext *s, AVIOContext *pb,
*pkt= vst->pkt;
vst->pkt.data= NULL;
vst->pkt.size= 0;
vst->pkt.buf = NULL;
#if FF_API_DESTRUCT_PACKET
vst->pkt.destruct = NULL;
#endif
if(vst->slices != vst->cur_slice) //FIXME find out how to set slices correct from the begin
memmove(pkt->data + 1 + 8*vst->cur_slice, pkt->data + 1 + 8*vst->slices,
vst->videobufpos - 1 - 8*vst->slices);

8
libavformat/rtpdec.c
View File

@ -864,11 +864,15 @@ int ff_parse_fmtp(AVStream *stream, PayloadContext *data, const char *p,
int ff_rtp_finalize_packet(AVPacket *pkt, AVIOContext **dyn_buf, int stream_idx)
{
int ret;
av_init_packet(pkt);
pkt->size = avio_close_dyn_buf(*dyn_buf, &pkt->data);
pkt->stream_index = stream_idx;
pkt->destruct = av_destruct_packet;
*dyn_buf = NULL;
*dyn_buf = NULL;
if ((ret = av_packet_from_data(pkt, pkt->data, pkt->size)) < 0) {
av_freep(&pkt->data);
return ret;
}
return pkt->size;
}

6
libavformat/rtpdec_qt.c
View File

@ -186,12 +186,14 @@ static int qt_rtp_parse_packet(AVFormatContext *s, PayloadContext *qt,
memcpy(qt->pkt.data + qt->pkt.size, buf + avio_tell(&pb), alen);
qt->pkt.size += alen;
if (has_marker_bit) {
*pkt = qt->pkt;
int ret = av_packet_from_data(pkt, qt->pkt.data, qt->pkt.size);
if (ret < 0)
return ret;
qt->pkt.size = 0;
qt->pkt.data = NULL;
pkt->flags = flags & RTP_FLAG_KEY ? AV_PKT_FLAG_KEY : 0;
pkt->stream_index = st->index;
pkt->destruct = av_destruct_packet;
memset(pkt->data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
return 0;
}

19
libavformat/utils.c
View File

@ -464,16 +464,20 @@ static AVPacket *add_to_pktbuf(AVPacketList **packet_buffer, AVPacket *pkt,
return &pktl->pkt;
}
static void queue_attached_pictures(AVFormatContext *s)
static int queue_attached_pictures(AVFormatContext *s)
{
int i;
for (i = 0; i < s->nb_streams; i++)
if (s->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC &&
s->streams[i]->discard < AVDISCARD_ALL) {
AVPacket copy = s->streams[i]->attached_pic;
copy.destruct = NULL;
copy.buf = av_buffer_ref(copy.buf);
if (!copy.buf)
return AVERROR(ENOMEM);
add_to_pktbuf(&s->raw_packet_buffer, &copy, &s->raw_packet_buffer_end);
}
return 0;
}
int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputFormat *fmt, AVDictionary **options)
@ -535,7 +539,8 @@ int avformat_open_input(AVFormatContext **ps, const char *filename, AVInputForma
goto fail;
ff_id3v2_free_extra_meta(&id3v2_extra_meta);
queue_attached_pictures(s);
if ((ret = queue_attached_pictures(s)) < 0)
goto fail;
if (s->pb && !s->data_offset)
s->data_offset = avio_tell(s->pb);
@ -1074,8 +1079,12 @@ static int parse_packet(AVFormatContext *s, AVPacket *pkt, int stream_index)
}
if (out_pkt.data == pkt->data && out_pkt.size == pkt->size) {
out_pkt.buf = pkt->buf;
pkt->buf = NULL;
#if FF_API_DESTRUCT_PACKET
out_pkt.destruct = pkt->destruct;
pkt->destruct = NULL;
#endif
}
if ((ret = av_dup_packet(&out_pkt)) < 0)
goto fail;
@ -1735,7 +1744,7 @@ int av_seek_frame(AVFormatContext *s, int stream_index, int64_t timestamp, int f
int ret = seek_frame_internal(s, stream_index, timestamp, flags);
if (ret >= 0)
queue_attached_pictures(s);
ret = queue_attached_pictures(s);
return ret;
}
@ -1751,7 +1760,7 @@ int avformat_seek_file(AVFormatContext *s, int stream_index, int64_t min_ts, int
ret = s->iformat->read_seek2(s, stream_index, min_ts, ts, max_ts, flags);
if (ret >= 0)
queue_attached_pictures(s);
ret = queue_attached_pictures(s);
return ret;
}