X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fencode.c;h=62c47afb245f4368595a8319c20e34f1b49c3748;hb=46dac8cf3d250184ab4247809bc03f60e14f4c0c;hp=d12c42526be5b94eac158752a8041f06aaa61278;hpb=a2ae381b5a6f50669bcbd37001c110567a61f446;p=ffmpeg

diff --git a/libavcodec/encode.c b/libavcodec/encode.c
index d12c42526be..62c47afb245 100644
--- a/libavcodec/encode.c
+++ b/libavcodec/encode.c
@@ -26,71 +26,101 @@
 #include "libavutil/samplefmt.h"
 
 #include "avcodec.h"
+#include "encode.h"
 #include "frame_thread_encoder.h"
 #include "internal.h"
 
 int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
 {
-    if (avpkt->size < 0) {
-        av_log(avctx, AV_LOG_ERROR, "Invalid negative user packet size %d\n", avpkt->size);
-        return AVERROR(EINVAL);
-    }
     if (size < 0 || size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
         av_log(avctx, AV_LOG_ERROR, "Invalid minimum required packet size %"PRId64" (max allowed is %d)\n",
                size, INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE);
         return AVERROR(EINVAL);
     }
 
+    av_assert0(!avpkt->data);
+
     if (avctx && 2*min_size < size) { // FIXME The factor needs to be finetuned
-        av_assert0(!avpkt->data || avpkt->data != avctx->internal->byte_buffer);
-        if (!avpkt->data || avpkt->size < size) {
-            av_fast_padded_malloc(&avctx->internal->byte_buffer, &avctx->internal->byte_buffer_size, size);
-            avpkt->data = avctx->internal->byte_buffer;
-            avpkt->size = avctx->internal->byte_buffer_size;
-        }
+        av_fast_padded_malloc(&avctx->internal->byte_buffer, &avctx->internal->byte_buffer_size, size);
+        avpkt->data = avctx->internal->byte_buffer;
+        avpkt->size = size;
     }
 
-    if (avpkt->data) {
-        AVBufferRef *buf = avpkt->buf;
-
-        if (avpkt->size < size) {
-            av_log(avctx, AV_LOG_ERROR, "User packet is too small (%d < %"PRId64")\n", avpkt->size, size);
-            return AVERROR(EINVAL);
-        }
-
-        av_init_packet(avpkt);
-        avpkt->buf      = buf;
-        avpkt->size     = size;
-        return 0;
-    } else {
+    if (!avpkt->data) {
         int ret = av_new_packet(avpkt, size);
         if (ret < 0)
             av_log(avctx, AV_LOG_ERROR, "Failed to allocate packet of size %"PRId64"\n", size);
         return ret;
     }
+
+    return 0;
 }
 
-int ff_alloc_packet(AVPacket *avpkt, int size)
+int avcodec_default_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int flags)
 {
-    return ff_alloc_packet2(NULL, avpkt, size, 0);
+    int ret;
+
+    if (avpkt->size < 0 || avpkt->size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
+        return AVERROR(EINVAL);
+
+    if (avpkt->data || avpkt->buf) {
+        av_log(avctx, AV_LOG_ERROR, "avpkt->{data,buf} != NULL in avcodec_default_get_encode_buffer()\n");
+        return AVERROR(EINVAL);
+    }
+
+    ret = av_buffer_realloc(&avpkt->buf, avpkt->size + AV_INPUT_BUFFER_PADDING_SIZE);
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Failed to allocate packet of size %d\n", avpkt->size);
+        return ret;
+    }
+    avpkt->data = avpkt->buf->data;
+
+    return 0;
+}
+
+int ff_get_encode_buffer(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int flags)
+{
+    int ret;
+
+    if (size < 0 || size > INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE)
+        return AVERROR(EINVAL);
+
+    av_assert0(!avpkt->data && !avpkt->buf);
+
+    avpkt->size = size;
+    ret = avctx->get_encode_buffer(avctx, avpkt, flags);
+    if (ret < 0)
+        goto fail;
+
+    if (!avpkt->data || !avpkt->buf) {
+        av_log(avctx, AV_LOG_ERROR, "No buffer returned by get_encode_buffer()\n");
+        ret = AVERROR(EINVAL);
+        goto fail;
+    }
+    memset(avpkt->data + avpkt->size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
+
+    ret = 0;
+fail:
+    if (ret < 0) {
+        av_log(avctx, AV_LOG_ERROR, "get_encode_buffer() failed\n");
+        av_packet_unref(avpkt);
+    }
+
+    return ret;
 }
 
 /**
  * Pad last frame with silence.
  */
-static int pad_last_frame(AVCodecContext *s, AVFrame **dst, const AVFrame *src)
+static int pad_last_frame(AVCodecContext *s, AVFrame *frame, const AVFrame *src)
 {
-    AVFrame *frame = NULL;
     int ret;
 
-    if (!(frame = av_frame_alloc()))
-        return AVERROR(ENOMEM);
-
     frame->format         = src->format;
     frame->channel_layout = src->channel_layout;
     frame->channels       = src->channels;
     frame->nb_samples     = s->frame_size;
-    ret = av_frame_get_buffer(frame, 32);
+    ret = av_frame_get_buffer(frame, 0);
     if (ret < 0)
         goto fail;
 
@@ -106,342 +136,426 @@ static int pad_last_frame(AVCodecContext *s, AVFrame **dst, const AVFrame *src)
                                       s->channels, s->sample_fmt)) < 0)
         goto fail;
 
-    *dst = frame;
-
     return 0;
 
 fail:
-    av_frame_free(&frame);
+    av_frame_unref(frame);
     return ret;
 }
 
-int attribute_align_arg avcodec_encode_audio2(AVCodecContext *avctx,
-                                              AVPacket *avpkt,
-                                              const AVFrame *frame,
-                                              int *got_packet_ptr)
+int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
+                            const AVSubtitle *sub)
 {
-    AVFrame *extended_frame = NULL;
-    AVFrame *padded_frame = NULL;
     int ret;
-    AVPacket user_pkt = *avpkt;
-    int needs_realloc = !user_pkt.data;
+    if (sub->start_display_time) {
+        av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
+        return -1;
+    }
 
-    *got_packet_ptr = 0;
+    ret = avctx->codec->encode_sub(avctx, buf, buf_size, sub);
+    avctx->frame_number++;
+    return ret;
+}
 
-    if (!avctx->codec->encode2) {
-        av_log(avctx, AV_LOG_ERROR, "This encoder requires using the avcodec_send_frame() API.\n");
-        return AVERROR(ENOSYS);
-    }
+int ff_encode_get_frame(AVCodecContext *avctx, AVFrame *frame)
+{
+    AVCodecInternal *avci = avctx->internal;
 
-    if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY) && !frame) {
-        av_packet_unref(avpkt);
-        return 0;
-    }
+    if (avci->draining)
+        return AVERROR_EOF;
 
-    /* ensure that extended_data is properly set */
-    if (frame && !frame->extended_data) {
-        if (av_sample_fmt_is_planar(avctx->sample_fmt) &&
-            avctx->channels > AV_NUM_DATA_POINTERS) {
-            av_log(avctx, AV_LOG_ERROR, "Encoding to a planar sample format, "
-                                        "with more than %d channels, but extended_data is not set.\n",
-                   AV_NUM_DATA_POINTERS);
-            return AVERROR(EINVAL);
-        }
-        av_log(avctx, AV_LOG_WARNING, "extended_data is not set.\n");
+    if (!avci->buffer_frame->buf[0])
+        return AVERROR(EAGAIN);
 
-        extended_frame = av_frame_alloc();
-        if (!extended_frame)
-            return AVERROR(ENOMEM);
+    av_frame_move_ref(frame, avci->buffer_frame);
 
-        memcpy(extended_frame, frame, sizeof(AVFrame));
-        extended_frame->extended_data = extended_frame->data;
-        frame = extended_frame;
+    return 0;
+}
+
+static int encode_simple_internal(AVCodecContext *avctx, AVPacket *avpkt)
+{
+    AVCodecInternal   *avci = avctx->internal;
+    EncodeSimpleContext *es = &avci->es;
+    AVFrame          *frame = es->in_frame;
+    int got_packet;
+    int ret;
+
+    if (avci->draining_done)
+        return AVERROR_EOF;
+
+    if (!frame->buf[0] && !avci->draining) {
+        av_frame_unref(frame);
+        ret = ff_encode_get_frame(avctx, frame);
+        if (ret < 0 && ret != AVERROR_EOF)
+            return ret;
     }
 
-    /* extract audio service type metadata */
-    if (frame) {
-        AVFrameSideData *sd = av_frame_get_side_data(frame, AV_FRAME_DATA_AUDIO_SERVICE_TYPE);
-        if (sd && sd->size >= sizeof(enum AVAudioServiceType))
-            avctx->audio_service_type = *(enum AVAudioServiceType*)sd->data;
+    if (!frame->buf[0]) {
+        if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY ||
+              (avci->frame_thread_encoder && avctx->active_thread_type & FF_THREAD_FRAME)))
+            return AVERROR_EOF;
+
+        // Flushing is signaled with a NULL frame
+        frame = NULL;
     }
 
-    /* check for valid frame size */
-    if (frame) {
-        if (avctx->codec->capabilities & AV_CODEC_CAP_SMALL_LAST_FRAME) {
-            if (frame->nb_samples > avctx->frame_size) {
-                av_log(avctx, AV_LOG_ERROR, "more samples than frame size (avcodec_encode_audio2)\n");
-                ret = AVERROR(EINVAL);
-                goto end;
-            }
-        } else if (!(avctx->codec->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE)) {
-            if (frame->nb_samples < avctx->frame_size &&
-                !avctx->internal->last_audio_frame) {
-                ret = pad_last_frame(avctx, &padded_frame, frame);
-                if (ret < 0)
-                    goto end;
+    got_packet = 0;
 
-                frame = padded_frame;
-                avctx->internal->last_audio_frame = 1;
-            }
+    av_assert0(avctx->codec->encode2);
 
-            if (frame->nb_samples != avctx->frame_size) {
-                av_log(avctx, AV_LOG_ERROR, "nb_samples (%d) != frame_size (%d) (avcodec_encode_audio2)\n", frame->nb_samples, avctx->frame_size);
-                ret = AVERROR(EINVAL);
-                goto end;
-            }
-        }
+    if (CONFIG_FRAME_THREAD_ENCODER &&
+        avci->frame_thread_encoder && (avctx->active_thread_type & FF_THREAD_FRAME))
+        /* This might modify frame, but it doesn't matter, because
+         * the frame properties used below are not used for video
+         * (due to the delay inherent in frame threaded encoding, it makes
+         *  no sense to use the properties of the current frame anyway). */
+        ret = ff_thread_video_encode_frame(avctx, avpkt, frame, &got_packet);
+    else {
+        ret = avctx->codec->encode2(avctx, avpkt, frame, &got_packet);
+        if (avctx->codec->type == AVMEDIA_TYPE_VIDEO && !ret && got_packet &&
+            !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY))
+            avpkt->pts = avpkt->dts = frame->pts;
     }
 
-    av_assert0(avctx->codec->encode2);
+    av_assert0(ret <= 0);
+
+    emms_c();
 
-    ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
-    if (!ret) {
-        if (*got_packet_ptr) {
-            if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY)) {
+    if (!ret && got_packet) {
+        if (avpkt->data) {
+            ret = av_packet_make_refcounted(avpkt);
+            if (ret < 0)
+                goto end;
+        }
+
+        if (frame && !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY)) {
+            if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
                 if (avpkt->pts == AV_NOPTS_VALUE)
                     avpkt->pts = frame->pts;
                 if (!avpkt->duration)
                     avpkt->duration = ff_samples_to_time_base(avctx,
                                                               frame->nb_samples);
             }
-            avpkt->dts = avpkt->pts;
-        } else {
-            avpkt->size = 0;
         }
-    }
-    if (avpkt->data && avpkt->data == avctx->internal->byte_buffer) {
-        needs_realloc = 0;
-        if (user_pkt.data) {
-            if (user_pkt.size >= avpkt->size) {
-                memcpy(user_pkt.data, avpkt->data, avpkt->size);
-            } else {
-                av_log(avctx, AV_LOG_ERROR, "Provided packet is too small, needs to be %d\n", avpkt->size);
-                avpkt->size = user_pkt.size;
-                ret = -1;
-            }
-            avpkt->buf      = user_pkt.buf;
-            avpkt->data     = user_pkt.data;
-        } else if (!avpkt->buf) {
-            ret = av_packet_make_refcounted(avpkt);
-            if (ret < 0)
-                goto end;
+        if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
+            /* NOTE: if we add any audio encoders which output non-keyframe packets,
+             *       this needs to be moved to the encoders, but for now we can do it
+             *       here to simplify things */
+            avpkt->flags |= AV_PKT_FLAG_KEY;
+            avpkt->dts = avpkt->pts;
         }
     }
 
-    if (!ret) {
-        if (needs_realloc && avpkt->data) {
-            ret = av_buffer_realloc(&avpkt->buf, avpkt->size + AV_INPUT_BUFFER_PADDING_SIZE);
-            if (ret >= 0)
-                avpkt->data = avpkt->buf->data;
-        }
-        if (frame)
-            avctx->frame_number++;
-    }
+    if (avci->draining && !got_packet)
+        avci->draining_done = 1;
 
-    if (ret < 0 || !*got_packet_ptr) {
+end:
+    if (ret < 0 || !got_packet)
         av_packet_unref(avpkt);
-        goto end;
-    }
 
-    /* NOTE: if we add any audio encoders which output non-keyframe packets,
-     *       this needs to be moved to the encoders, but for now we can do it
-     *       here to simplify things */
-    avpkt->flags |= AV_PKT_FLAG_KEY;
+    if (frame) {
+        if (!ret)
+            avctx->frame_number++;
+        av_frame_unref(frame);
+    }
 
-end:
-    av_frame_free(&padded_frame);
-    av_free(extended_frame);
+    if (got_packet)
+        // Encoders must always return ref-counted buffers.
+        // Side-data only packets have no data and can be not ref-counted.
+        av_assert0(!avpkt->data || avpkt->buf);
 
     return ret;
 }
 
-int attribute_align_arg avcodec_encode_video2(AVCodecContext *avctx,
-                                              AVPacket *avpkt,
-                                              const AVFrame *frame,
-                                              int *got_packet_ptr)
+static int encode_simple_receive_packet(AVCodecContext *avctx, AVPacket *avpkt)
 {
     int ret;
-    AVPacket user_pkt = *avpkt;
-    int needs_realloc = !user_pkt.data;
-
-    *got_packet_ptr = 0;
-
-    if (!avctx->codec->encode2) {
-        av_log(avctx, AV_LOG_ERROR, "This encoder requires using the avcodec_send_frame() API.\n");
-        return AVERROR(ENOSYS);
-    }
 
-    if(CONFIG_FRAME_THREAD_ENCODER &&
-       avctx->internal->frame_thread_encoder && (avctx->active_thread_type&FF_THREAD_FRAME))
-        return ff_thread_video_encode_frame(avctx, avpkt, frame, got_packet_ptr);
-
-    if ((avctx->flags&AV_CODEC_FLAG_PASS1) && avctx->stats_out)
-        avctx->stats_out[0] = '\0';
-
-    if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY) && !frame) {
-        av_packet_unref(avpkt);
-        return 0;
+    while (!avpkt->data && !avpkt->side_data) {
+        ret = encode_simple_internal(avctx, avpkt);
+        if (ret < 0)
+            return ret;
     }
 
-    if (av_image_check_size2(avctx->width, avctx->height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx))
-        return AVERROR(EINVAL);
-
-    if (frame && frame->format == AV_PIX_FMT_NONE)
-        av_log(avctx, AV_LOG_WARNING, "AVFrame.format is not set\n");
-    if (frame && (frame->width == 0 || frame->height == 0))
-        av_log(avctx, AV_LOG_WARNING, "AVFrame.width or height is not set\n");
+    return 0;
+}
 
-    av_assert0(avctx->codec->encode2);
+static int encode_receive_packet_internal(AVCodecContext *avctx, AVPacket *avpkt)
+{
+    AVCodecInternal *avci = avctx->internal;
+    int ret;
 
-    ret = avctx->codec->encode2(avctx, avpkt, frame, got_packet_ptr);
-    av_assert0(ret <= 0);
+    if (avci->draining_done)
+        return AVERROR_EOF;
 
-    emms_c();
+    av_assert0(!avpkt->data && !avpkt->side_data);
 
-    if (avpkt->data && avpkt->data == avctx->internal->byte_buffer) {
-        needs_realloc = 0;
-        if (user_pkt.data) {
-            if (user_pkt.size >= avpkt->size) {
-                memcpy(user_pkt.data, avpkt->data, avpkt->size);
-            } else {
-                av_log(avctx, AV_LOG_ERROR, "Provided packet is too small, needs to be %d\n", avpkt->size);
-                avpkt->size = user_pkt.size;
-                ret = -1;
-            }
-            avpkt->buf      = user_pkt.buf;
-            avpkt->data     = user_pkt.data;
-        } else if (!avpkt->buf) {
-            ret = av_packet_make_refcounted(avpkt);
-            if (ret < 0)
-                return ret;
-        }
+    if (avctx->codec->type == AVMEDIA_TYPE_VIDEO) {
+        if ((avctx->flags & AV_CODEC_FLAG_PASS1) && avctx->stats_out)
+            avctx->stats_out[0] = '\0';
+        if (av_image_check_size2(avctx->width, avctx->height, avctx->max_pixels, AV_PIX_FMT_NONE, 0, avctx))
+            return AVERROR(EINVAL);
     }
 
-    if (!ret) {
-        if (!*got_packet_ptr)
-            avpkt->size = 0;
-        else if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY))
-            avpkt->pts = avpkt->dts = frame->pts;
-
-        if (needs_realloc && avpkt->data) {
-            ret = av_buffer_realloc(&avpkt->buf, avpkt->size + AV_INPUT_BUFFER_PADDING_SIZE);
-            if (ret >= 0)
-                avpkt->data = avpkt->buf->data;
-        }
-
-        if (frame)
-            avctx->frame_number++;
-    }
+    if (avctx->codec->receive_packet) {
+        ret = avctx->codec->receive_packet(avctx, avpkt);
+        if (ret < 0)
+            av_packet_unref(avpkt);
+        else
+            // Encoders must always return ref-counted buffers.
+            // Side-data only packets have no data and can be not ref-counted.
+            av_assert0(!avpkt->data || avpkt->buf);
+    } else
+        ret = encode_simple_receive_packet(avctx, avpkt);
 
-    if (ret < 0 || !*got_packet_ptr)
-        av_packet_unref(avpkt);
+    if (ret == AVERROR_EOF)
+        avci->draining_done = 1;
 
     return ret;
 }
 
-int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
-                            const AVSubtitle *sub)
+static int encode_send_frame_internal(AVCodecContext *avctx, const AVFrame *src)
 {
+    AVCodecInternal *avci = avctx->internal;
+    AVFrame *dst = avci->buffer_frame;
     int ret;
-    if (sub->start_display_time) {
-        av_log(avctx, AV_LOG_ERROR, "start_display_time must be 0.\n");
-        return -1;
-    }
 
-    ret = avctx->codec->encode_sub(avctx, buf, buf_size, sub);
-    avctx->frame_number++;
-    return ret;
-}
+    if (avctx->codec->type == AVMEDIA_TYPE_AUDIO) {
+        /* extract audio service type metadata */
+        AVFrameSideData *sd = av_frame_get_side_data(src, AV_FRAME_DATA_AUDIO_SERVICE_TYPE);
+        if (sd && sd->size >= sizeof(enum AVAudioServiceType))
+            avctx->audio_service_type = *(enum AVAudioServiceType*)sd->data;
 
-static int do_encode(AVCodecContext *avctx, const AVFrame *frame, int *got_packet)
-{
-    int ret;
-    *got_packet = 0;
+        /* check for valid frame size */
+        if (avctx->codec->capabilities & AV_CODEC_CAP_SMALL_LAST_FRAME) {
+            if (src->nb_samples > avctx->frame_size) {
+                av_log(avctx, AV_LOG_ERROR, "more samples than frame size\n");
+                return AVERROR(EINVAL);
+            }
+        } else if (!(avctx->codec->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE)) {
+            /* if we already got an undersized frame, that must have been the last */
+            if (avctx->internal->last_audio_frame) {
+                av_log(avctx, AV_LOG_ERROR, "frame_size (%d) was not respected for a non-last frame\n", avctx->frame_size);
+                return AVERROR(EINVAL);
+            }
 
-    av_packet_unref(avctx->internal->buffer_pkt);
-    avctx->internal->buffer_pkt_valid = 0;
+            if (src->nb_samples < avctx->frame_size) {
+                ret = pad_last_frame(avctx, dst, src);
+                if (ret < 0)
+                    return ret;
 
-    if (avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
-        ret = avcodec_encode_video2(avctx, avctx->internal->buffer_pkt,
-                                    frame, got_packet);
-    } else if (avctx->codec_type == AVMEDIA_TYPE_AUDIO) {
-        ret = avcodec_encode_audio2(avctx, avctx->internal->buffer_pkt,
-                                    frame, got_packet);
-    } else {
-        ret = AVERROR(EINVAL);
+                avctx->internal->last_audio_frame = 1;
+            } else if (src->nb_samples > avctx->frame_size) {
+                av_log(avctx, AV_LOG_ERROR, "nb_samples (%d) != frame_size (%d)\n", src->nb_samples, avctx->frame_size);
+                return AVERROR(EINVAL);
+            }
+        }
     }
 
-    if (ret >= 0 && *got_packet) {
-        // Encoders must always return ref-counted buffers.
-        // Side-data only packets have no data and can be not ref-counted.
-        av_assert0(!avctx->internal->buffer_pkt->data || avctx->internal->buffer_pkt->buf);
-        avctx->internal->buffer_pkt_valid = 1;
-        ret = 0;
-    } else {
-        av_packet_unref(avctx->internal->buffer_pkt);
+    if (!dst->data[0]) {
+        ret = av_frame_ref(dst, src);
+        if (ret < 0)
+             return ret;
     }
 
-    return ret;
+    return 0;
 }
 
 int attribute_align_arg avcodec_send_frame(AVCodecContext *avctx, const AVFrame *frame)
 {
+    AVCodecInternal *avci = avctx->internal;
+    int ret;
+
     if (!avcodec_is_open(avctx) || !av_codec_is_encoder(avctx->codec))
         return AVERROR(EINVAL);
 
-    if (avctx->internal->draining)
+    if (avci->draining)
         return AVERROR_EOF;
 
-    if (!frame) {
-        avctx->internal->draining = 1;
+    if (avci->buffer_frame->data[0])
+        return AVERROR(EAGAIN);
 
-        if (!(avctx->codec->capabilities & AV_CODEC_CAP_DELAY))
-            return 0;
+    if (!frame) {
+        avci->draining = 1;
+    } else {
+        ret = encode_send_frame_internal(avctx, frame);
+        if (ret < 0)
+            return ret;
     }
 
-    if (avctx->codec->send_frame)
-        return avctx->codec->send_frame(avctx, frame);
-
-    // Emulation via old API. Do it here instead of avcodec_receive_packet, because:
-    // 1. if the AVFrame is not refcounted, the copying will be much more
-    //    expensive than copying the packet data
-    // 2. assume few users use non-refcounted AVPackets, so usually no copy is
-    //    needed
-
-    if (avctx->internal->buffer_pkt_valid)
-        return AVERROR(EAGAIN);
+    if (!avci->buffer_pkt->data && !avci->buffer_pkt->side_data) {
+        ret = encode_receive_packet_internal(avctx, avci->buffer_pkt);
+        if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
+            return ret;
+    }
 
-    return do_encode(avctx, frame, &(int){0});
+    return 0;
 }
 
 int attribute_align_arg avcodec_receive_packet(AVCodecContext *avctx, AVPacket *avpkt)
 {
+    AVCodecInternal *avci = avctx->internal;
+    int ret;
+
     av_packet_unref(avpkt);
 
     if (!avcodec_is_open(avctx) || !av_codec_is_encoder(avctx->codec))
         return AVERROR(EINVAL);
 
-    if (avctx->codec->receive_packet) {
-        if (avctx->internal->draining && !(avctx->codec->capabilities & AV_CODEC_CAP_DELAY))
-            return AVERROR_EOF;
-        return avctx->codec->receive_packet(avctx, avpkt);
+    if (avci->buffer_pkt->data || avci->buffer_pkt->side_data) {
+        av_packet_move_ref(avpkt, avci->buffer_pkt);
+    } else {
+        ret = encode_receive_packet_internal(avctx, avpkt);
+        if (ret < 0)
+            return ret;
     }
 
-    // Emulation via old API.
+    return 0;
+}
 
-    if (!avctx->internal->buffer_pkt_valid) {
-        int got_packet;
-        int ret;
-        if (!avctx->internal->draining)
-            return AVERROR(EAGAIN);
-        ret = do_encode(avctx, NULL, &got_packet);
-        if (ret < 0)
-            return ret;
-        if (ret >= 0 && !got_packet)
-            return AVERROR_EOF;
+int ff_encode_preinit(AVCodecContext *avctx)
+{
+    int i;
+
+    if (avctx->time_base.num <= 0 || avctx->time_base.den <= 0) {
+        av_log(avctx, AV_LOG_ERROR, "The encoder timebase is not set.\n");
+        return AVERROR(EINVAL);
+    }
+
+    if (avctx->codec->sample_fmts) {
+        for (i = 0; avctx->codec->sample_fmts[i] != AV_SAMPLE_FMT_NONE; i++) {
+            if (avctx->sample_fmt == avctx->codec->sample_fmts[i])
+                break;
+            if (avctx->channels == 1 &&
+                av_get_planar_sample_fmt(avctx->sample_fmt) ==
+                av_get_planar_sample_fmt(avctx->codec->sample_fmts[i])) {
+                avctx->sample_fmt = avctx->codec->sample_fmts[i];
+                break;
+            }
+        }
+        if (avctx->codec->sample_fmts[i] == AV_SAMPLE_FMT_NONE) {
+            char buf[128];
+            snprintf(buf, sizeof(buf), "%d", avctx->sample_fmt);
+            av_log(avctx, AV_LOG_ERROR, "Specified sample format %s is invalid or not supported\n",
+                   (char *)av_x_if_null(av_get_sample_fmt_name(avctx->sample_fmt), buf));
+            return AVERROR(EINVAL);
+        }
+    }
+    if (avctx->codec->pix_fmts) {
+        for (i = 0; avctx->codec->pix_fmts[i] != AV_PIX_FMT_NONE; i++)
+            if (avctx->pix_fmt == avctx->codec->pix_fmts[i])
+                break;
+        if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_NONE) {
+            char buf[128];
+            snprintf(buf, sizeof(buf), "%d", avctx->pix_fmt);
+            av_log(avctx, AV_LOG_ERROR, "Specified pixel format %s is invalid or not supported\n",
+                   (char *)av_x_if_null(av_get_pix_fmt_name(avctx->pix_fmt), buf));
+            return AVERROR(EINVAL);
+        }
+        if (avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ420P ||
+            avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ411P ||
+            avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ422P ||
+            avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ440P ||
+            avctx->codec->pix_fmts[i] == AV_PIX_FMT_YUVJ444P)
+            avctx->color_range = AVCOL_RANGE_JPEG;
+    }
+    if (avctx->codec->supported_samplerates) {
+        for (i = 0; avctx->codec->supported_samplerates[i] != 0; i++)
+            if (avctx->sample_rate == avctx->codec->supported_samplerates[i])
+                break;
+        if (avctx->codec->supported_samplerates[i] == 0) {
+            av_log(avctx, AV_LOG_ERROR, "Specified sample rate %d is not supported\n",
+                   avctx->sample_rate);
+            return AVERROR(EINVAL);
+        }
+    }
+    if (avctx->sample_rate < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Specified sample rate %d is not supported\n",
+                avctx->sample_rate);
+        return AVERROR(EINVAL);
+    }
+    if (avctx->codec->channel_layouts) {
+        if (!avctx->channel_layout) {
+            av_log(avctx, AV_LOG_WARNING, "Channel layout not specified\n");
+        } else {
+            for (i = 0; avctx->codec->channel_layouts[i] != 0; i++)
+                if (avctx->channel_layout == avctx->codec->channel_layouts[i])
+                    break;
+            if (avctx->codec->channel_layouts[i] == 0) {
+                char buf[512];
+                av_get_channel_layout_string(buf, sizeof(buf), -1, avctx->channel_layout);
+                av_log(avctx, AV_LOG_ERROR, "Specified channel layout '%s' is not supported\n", buf);
+                return AVERROR(EINVAL);
+            }
+        }
+    }
+    if (avctx->channel_layout && avctx->channels) {
+        int channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
+        if (channels != avctx->channels) {
+            char buf[512];
+            av_get_channel_layout_string(buf, sizeof(buf), -1, avctx->channel_layout);
+            av_log(avctx, AV_LOG_ERROR,
+                   "Channel layout '%s' with %d channels does not match number of specified channels %d\n",
+                   buf, channels, avctx->channels);
+            return AVERROR(EINVAL);
+        }
+    } else if (avctx->channel_layout) {
+        avctx->channels = av_get_channel_layout_nb_channels(avctx->channel_layout);
+    }
+    if (avctx->channels < 0) {
+        av_log(avctx, AV_LOG_ERROR, "Specified number of channels %d is not supported\n",
+                avctx->channels);
+        return AVERROR(EINVAL);
+    }
+    if(avctx->codec_type == AVMEDIA_TYPE_VIDEO) {
+        const AVPixFmtDescriptor *pixdesc = av_pix_fmt_desc_get(avctx->pix_fmt);
+        if (    avctx->bits_per_raw_sample < 0
+            || (avctx->bits_per_raw_sample > 8 && pixdesc->comp[0].depth <= 8)) {
+            av_log(avctx, AV_LOG_WARNING, "Specified bit depth %d not possible with the specified pixel formats depth %d\n",
+                avctx->bits_per_raw_sample, pixdesc->comp[0].depth);
+            avctx->bits_per_raw_sample = pixdesc->comp[0].depth;
+        }
+        if (avctx->width <= 0 || avctx->height <= 0) {
+            av_log(avctx, AV_LOG_ERROR, "dimensions not set\n");
+            return AVERROR(EINVAL);
+        }
+    }
+    if (   (avctx->codec_type == AVMEDIA_TYPE_VIDEO || avctx->codec_type == AVMEDIA_TYPE_AUDIO)
+        && avctx->bit_rate>0 && avctx->bit_rate<1000) {
+        av_log(avctx, AV_LOG_WARNING, "Bitrate %"PRId64" is extremely low, maybe you mean %"PRId64"k\n", avctx->bit_rate, avctx->bit_rate);
+    }
+
+    if (!avctx->rc_initial_buffer_occupancy)
+        avctx->rc_initial_buffer_occupancy = avctx->rc_buffer_size * 3LL / 4;
+
+    if (avctx->ticks_per_frame && avctx->time_base.num &&
+        avctx->ticks_per_frame > INT_MAX / avctx->time_base.num) {
+        av_log(avctx, AV_LOG_ERROR,
+               "ticks_per_frame %d too large for the timebase %d/%d.",
+               avctx->ticks_per_frame,
+               avctx->time_base.num,
+               avctx->time_base.den);
+        return AVERROR(EINVAL);
+    }
+
+    if (avctx->hw_frames_ctx) {
+        AVHWFramesContext *frames_ctx = (AVHWFramesContext*)avctx->hw_frames_ctx->data;
+        if (frames_ctx->format != avctx->pix_fmt) {
+            av_log(avctx, AV_LOG_ERROR,
+                   "Mismatching AVCodecContext.pix_fmt and AVHWFramesContext.format\n");
+            return AVERROR(EINVAL);
+        }
+        if (avctx->sw_pix_fmt != AV_PIX_FMT_NONE &&
+            avctx->sw_pix_fmt != frames_ctx->sw_format) {
+            av_log(avctx, AV_LOG_ERROR,
+                   "Mismatching AVCodecContext.sw_pix_fmt (%s) "
+                   "and AVHWFramesContext.sw_format (%s)\n",
+                   av_get_pix_fmt_name(avctx->sw_pix_fmt),
+                   av_get_pix_fmt_name(frames_ctx->sw_format));
+            return AVERROR(EINVAL);
+        }
+        avctx->sw_pix_fmt = frames_ctx->sw_format;
     }
 
-    av_packet_move_ref(avpkt, avctx->internal->buffer_pkt);
-    avctx->internal->buffer_pkt_valid = 0;
     return 0;
 }