[FFmpeg-devel] [PATCH v2] avcodec/libaomenc: remove one memcpy when queueing packets
James Almer
jamrial at gmail.com
Thu Aug 25 20:46:59 EEST 2022
Don't use an intermediary buffer. Achieve this by replacing FrameListData with
a PacketList, and by allocating and populating every packet's payload before
inserting them into the list.
Signed-off-by: James Almer <jamrial at gmail.com>
---
libavcodec/libaomenc.c | 201 +++++++++++++++--------------------------
1 file changed, 74 insertions(+), 127 deletions(-)
diff --git a/libavcodec/libaomenc.c b/libavcodec/libaomenc.c
index a82b933c18..a422e5a4f5 100644
--- a/libavcodec/libaomenc.c
+++ b/libavcodec/libaomenc.c
@@ -38,6 +38,7 @@
#include "av1.h"
#include "avcodec.h"
+#include "bytestream.h"
#include "bsf.h"
#include "codec_internal.h"
#include "encode.h"
@@ -46,24 +47,6 @@
#include "packet_internal.h"
#include "profiles.h"
-/*
- * Portion of struct aom_codec_cx_pkt from aom_encoder.h.
- * One encoded frame returned from the library.
- */
-struct FrameListData {
- void *buf; /**< compressed data buffer */
- size_t sz; /**< length of compressed data */
- int64_t pts; /**< time stamp to show frame
- (in timebase units) */
- unsigned long duration; /**< duration to show frame
- (in timebase units) */
- uint32_t flags; /**< flags for this frame */
- uint64_t sse[4];
- int have_sse; /**< true if we have pending sse[] */
- uint64_t frame_number;
- struct FrameListData *next;
-};
-
typedef struct AOMEncoderContext {
AVClass *class;
AVBSFContext *bsf;
@@ -71,7 +54,8 @@ typedef struct AOMEncoderContext {
struct aom_image rawimg;
struct aom_fixed_buf twopass_stats;
unsigned twopass_stats_size;
- struct FrameListData *coded_frame_list;
+ PacketList coded_frame_list;
+ AVPacket *avpkt;
int cpu_used;
int auto_alt_ref;
int arnr_max_frames;
@@ -283,33 +267,6 @@ static av_cold void dump_enc_cfg(AVCodecContext *avctx,
av_log(avctx, level, "\n");
}
-static void coded_frame_add(void *list, struct FrameListData *cx_frame)
-{
- struct FrameListData **p = list;
-
- while (*p)
- p = &(*p)->next;
- *p = cx_frame;
- cx_frame->next = NULL;
-}
-
-static av_cold void free_coded_frame(struct FrameListData *cx_frame)
-{
- av_freep(&cx_frame->buf);
- av_freep(&cx_frame);
-}
-
-static av_cold void free_frame_list(struct FrameListData *list)
-{
- struct FrameListData *p = list;
-
- while (p) {
- list = list->next;
- free_coded_frame(p);
- p = list;
- }
-}
-
static av_cold int codecctl_int(AVCodecContext *avctx,
#ifdef UENUM1BYTE
aome_enc_control_id id,
@@ -432,7 +389,8 @@ static av_cold int aom_free(AVCodecContext *avctx)
aom_codec_destroy(&ctx->encoder);
av_freep(&ctx->twopass_stats.buf);
av_freep(&avctx->stats_out);
- free_frame_list(ctx->coded_frame_list);
+ avpriv_packet_list_free(&ctx->coded_frame_list);
+ av_packet_free(&ctx->avpkt);
av_bsf_free(&ctx->bsf);
return 0;
}
@@ -1042,6 +1000,10 @@ static av_cold int aom_init(AVCodecContext *avctx,
return ret;
}
+ ctx->avpkt = av_packet_alloc();
+ if (!ctx->avpkt)
+ return AVERROR(ENOMEM);
+
if (enccfg.rc_end_usage == AOM_CBR ||
enccfg.g_pass != AOM_RC_ONE_PASS) {
cpb_props->max_bitrate = avctx->rc_max_rate;
@@ -1053,25 +1015,41 @@ static av_cold int aom_init(AVCodecContext *avctx,
return 0;
}
-static inline void cx_pktcpy(AOMContext *ctx,
- struct FrameListData *dst,
- const struct aom_codec_cx_pkt *src)
+static int cx_pktcpy(AVCodecContext *avctx,
+ AVPacket *dst,
+ const struct aom_codec_cx_pkt *src)
{
- dst->pts = src->data.frame.pts;
- dst->duration = src->data.frame.duration;
- dst->flags = src->data.frame.flags;
- dst->sz = src->data.frame.sz;
- dst->buf = src->data.frame.buf;
+ AOMContext *ctx = avctx->priv_data;
+ int av_unused pict_type;
+ int ret;
+
+ ret = ff_get_encode_buffer(avctx, dst, src->data.frame.sz, 0);
+ if (ret < 0) {
+ av_log(avctx, AV_LOG_ERROR,
+ "Error getting output packet of size %"SIZE_SPECIFIER".\n", src->data.frame.sz);
+ return ret;
+ }
+ memcpy(dst->data, src->data.frame.buf, src->data.frame.sz);
+ dst->pts = dst->dts = src->data.frame.pts;
+
+ if (src->data.frame.flags & AOM_FRAME_IS_KEY) {
+ dst->flags |= AV_PKT_FLAG_KEY;
#ifdef AOM_FRAME_IS_INTRAONLY
- dst->frame_number = ++ctx->frame_number;
- dst->have_sse = ctx->have_sse;
+ pict_type = AV_PICTURE_TYPE_I;
+ } else if (src->data.frame.flags & AOM_FRAME_IS_INTRAONLY) {
+ pict_type = AV_PICTURE_TYPE_I;
+ } else {
+ pict_type = AV_PICTURE_TYPE_P;
+ }
+
if (ctx->have_sse) {
- /* associate last-seen SSE to the frame. */
- /* Transfers ownership from ctx to dst. */
- memcpy(dst->sse, ctx->sse, sizeof(dst->sse));
ctx->have_sse = 0;
- }
+ ret = ff_side_data_set_encoder_stats(dst, 0, ctx->sse + 1, 3, pict_type);
+ if (ret < 0)
+ return ret;
#endif
+ }
+ return 0;
}
/**
@@ -1081,50 +1059,32 @@ static inline void cx_pktcpy(AOMContext *ctx,
* @return packet data size on success
* @return a negative AVERROR on error
*/
-static int storeframe(AVCodecContext *avctx, struct FrameListData *cx_frame,
- AVPacket *pkt)
+static int storeframe(AVCodecContext *avctx, AVPacket *dst, AVPacket *src)
{
AOMContext *ctx = avctx->priv_data;
- int av_unused pict_type;
- int ret = ff_get_encode_buffer(avctx, pkt, cx_frame->sz, 0);
- if (ret < 0) {
- av_log(avctx, AV_LOG_ERROR,
- "Error getting output packet of size %"SIZE_SPECIFIER".\n", cx_frame->sz);
- return ret;
- }
- memcpy(pkt->data, cx_frame->buf, pkt->size);
- pkt->pts = pkt->dts = cx_frame->pts;
-
- if (!!(cx_frame->flags & AOM_FRAME_IS_KEY)) {
- pkt->flags |= AV_PKT_FLAG_KEY;
-#ifdef AOM_FRAME_IS_INTRAONLY
- pict_type = AV_PICTURE_TYPE_I;
- } else if (cx_frame->flags & AOM_FRAME_IS_INTRAONLY) {
- pict_type = AV_PICTURE_TYPE_I;
- } else {
- pict_type = AV_PICTURE_TYPE_P;
- }
+ const uint8_t *sd;
+ size_t size;
+ int ret;
- ff_side_data_set_encoder_stats(pkt, 0, cx_frame->sse + 1,
- cx_frame->have_sse ? 3 : 0, pict_type);
+ av_packet_move_ref(dst, src);
- if (cx_frame->have_sse) {
+ sd = av_packet_get_side_data(dst, AV_PKT_DATA_QUALITY_STATS, &size);
+ if (sd && size >= 4 + 4 + 8 * 3) {
int i;
+ sd += 4 + 4;
for (i = 0; i < 3; ++i) {
- avctx->error[i] += cx_frame->sse[i + 1];
+ avctx->error[i] += bytestream_get_le64(&sd);
}
- cx_frame->have_sse = 0;
-#endif
}
if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) {
- ret = av_bsf_send_packet(ctx->bsf, pkt);
+ ret = av_bsf_send_packet(ctx->bsf, dst);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "extract_extradata filter "
"failed to send input packet\n");
return ret;
}
- ret = av_bsf_receive_packet(ctx->bsf, pkt);
+ ret = av_bsf_receive_packet(ctx->bsf, dst);
if (ret < 0) {
av_log(avctx, AV_LOG_ERROR, "extract_extradata filter "
@@ -1132,7 +1092,7 @@ static int storeframe(AVCodecContext *avctx, struct FrameListData *cx_frame,
return ret;
}
}
- return pkt->size;
+ return dst->size;
}
/**
@@ -1148,16 +1108,14 @@ static int queue_frames(AVCodecContext *avctx, AVPacket *pkt_out)
AOMContext *ctx = avctx->priv_data;
const struct aom_codec_cx_pkt *pkt;
const void *iter = NULL;
- int size = 0;
+ int ret, size = 0;
- if (ctx->coded_frame_list) {
- struct FrameListData *cx_frame = ctx->coded_frame_list;
+ if (!avpriv_packet_list_get(&ctx->coded_frame_list, ctx->avpkt)) {
/* return the leading frame if we've already begun queueing */
- size = storeframe(avctx, cx_frame, pkt_out);
- if (size < 0)
- return size;
- ctx->coded_frame_list = cx_frame->next;
- free_coded_frame(cx_frame);
+ ret = storeframe(avctx, pkt_out, ctx->avpkt);
+ if (ret < 0)
+ goto fail;
+ size = ret;
}
/* consume all available output from the encoder before returning. buffers
@@ -1165,37 +1123,21 @@ static int queue_frames(AVCodecContext *avctx, AVPacket *pkt_out)
while ((pkt = aom_codec_get_cx_data(&ctx->encoder, &iter))) {
switch (pkt->kind) {
case AOM_CODEC_CX_FRAME_PKT:
+ ret = cx_pktcpy(avctx, ctx->avpkt, pkt);
+ if (ret < 0)
+ goto fail;
if (!size) {
- struct FrameListData cx_frame;
-
/* avoid storing the frame when the list is empty and we haven't yet
* provided a frame for output */
- av_assert0(!ctx->coded_frame_list);
- cx_pktcpy(ctx, &cx_frame, pkt);
- size = storeframe(avctx, &cx_frame, pkt_out);
- if (size < 0)
- return size;
+ av_assert0(!ctx->coded_frame_list.head);
+ ret = storeframe(avctx, pkt_out, ctx->avpkt);
+ if (ret < 0)
+ goto fail;
+ size = ret;
} else {
- struct FrameListData *cx_frame =
- av_malloc(sizeof(struct FrameListData));
-
- if (!cx_frame) {
- av_log(avctx, AV_LOG_ERROR,
- "Frame queue element alloc failed\n");
- return AVERROR(ENOMEM);
- }
- cx_pktcpy(ctx, cx_frame, pkt);
- cx_frame->buf = av_malloc(cx_frame->sz);
-
- if (!cx_frame->buf) {
- av_log(avctx, AV_LOG_ERROR,
- "Data buffer alloc (%"SIZE_SPECIFIER" bytes) failed\n",
- cx_frame->sz);
- av_freep(&cx_frame);
- return AVERROR(ENOMEM);
- }
- memcpy(cx_frame->buf, pkt->data.frame.buf, pkt->data.frame.sz);
- coded_frame_add(&ctx->coded_frame_list, cx_frame);
+ ret = avpriv_packet_list_put(&ctx->coded_frame_list, ctx->avpkt, NULL, 0);
+ if (ret < 0)
+ goto fail;
}
break;
case AOM_CODEC_STATS_PKT:
@@ -1209,7 +1151,8 @@ static int queue_frames(AVCodecContext *avctx, AVPacket *pkt_out)
av_freep(&stats->buf);
stats->sz = 0;
av_log(avctx, AV_LOG_ERROR, "Stat buffer realloc failed\n");
- return AVERROR(ENOMEM);
+ ret = AVERROR(ENOMEM);
+ goto fail;
}
stats->buf = tmp;
memcpy((uint8_t *)stats->buf + stats->sz,
@@ -1236,6 +1179,10 @@ static int queue_frames(AVCodecContext *avctx, AVPacket *pkt_out)
}
return size;
+fail:
+ av_packet_unref(ctx->avpkt);
+ av_packet_unref(pkt_out);
+ return ret;
}
static enum AVPixelFormat aomfmt_to_pixfmt(struct aom_image *img)
--
2.37.2
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